Instant tools

Calculate Body Mass Index (BMI) and body surface area from weight and height. Includes BMI classification.

Calculate mean arterial pressure (MAP) from systolic and diastolic blood pressure.

Calculate ideal body weight by height using the Devine, Robinson, Miller, and Hamwi formulas.

Calculate corrected QT (QTc) using Bazett, Fridericia, Framingham, and Hodges formulas.

Calculate LDL cholesterol using the Friedewald formula from total cholesterol, HDL, and triglycerides.

Calculate fluid resuscitation volume for burn patients using the Parkland formula.

Convert HbA1c percentage to estimated average glucose (eAG) in mg/dL and mmol/L.

Confusion Assessment Method for the ICU (CAM-ICU) for delirium screening in critically ill patients.

Classify asthma control using the GINA 2025 criteria (well-controlled, partly controlled, uncontrolled).

CAGE questionnaire for alcohol use disorder screening (4 questions).

Calculate SAAG to differentiate portal hypertensive from non-portal hypertensive ascites.

Calculate transferrin saturation index from serum iron and total iron-binding capacity (TIBC).

Score cognitive function with the 30-point Mini-Mental State Examination.

Predict 6-month mortality in alcoholic hepatitis patients on steroid therapy using the Lille model.

Stratify Covid-19 severity by clinical and laboratory criteria.

Assess nicotine dependence severity with the Fagerström Test (6 questions).

Estimate total blood volume by weight, height, and sex (Nadler formula).

Estimate glomerular filtration rate (eGFR) using the 2021 CKD-EPI creatinine equation.

Estimate creatinine clearance using the Cockcroft-Gault formula.

Estimate glomerular filtration rate using the 4-variable MDRD equation.

Differentiate prerenal from intrinsic acute kidney injury using FENa.

FEUrea for AKI workup in patients on diuretics where FENa is unreliable.

Calculate UPCR from a single urine sample to estimate 24-hour protein excretion.

Calculate bicarbonate replacement dose for severe metabolic acidosis.

Calculate gestational age and estimated due date from last menstrual period (Naegele rule).

Calculate gestational age and due date from ultrasound biometry.

Calculate the APGAR score at 1 and 5 minutes for newborn assessment.

Pediatric-adapted Glasgow Coma Scale for infants and children.

Estimate uncuffed and cuffed ETT size and depth by age in children.

Pediatric drug infusion rate calculator in mcg/kg/min.

Pediatric drug infusion rate calculator in mg/kg/hour.

Score severity of neonatal abstinence syndrome using the Finnegan scale.

Score consciousness in infants and pre-verbal children on three responses, 3 to 11, where the standard Glasgow verbal items do not apply.

Seven CBC findings become a 0 to 7 sepsis screen for newborns, so you can risk-stratify while the blood culture is still pending.

Estimate gestational age from five physical findings in the first day of life, for when ultrasound dating or a last menstrual period is missing.

Combines physical signs with neurological responses to date a newborn, the Capurro variant to reach for after the first 24 hours of life.

Calculate serum osmolality from sodium, glucose, and BUN.

Correct total serum calcium for hypoalbuminemia.

Correct serum sodium for hyperglycemia (Katz / Hillier formulas).

Calculate total body iron deficit for IV iron replacement using the Ganzoni formula.

Convert between benzodiazepine doses (diazepam, lorazepam, alprazolam, clonazepam, etc.).

Convert between corticosteroid doses (prednisone, dexamethasone, hydrocortisone, etc.).

Convert between opioid doses to morphine milligram equivalents (MME).

Calculate induction and paralytic doses for rapid sequence intubation by weight.

Correct total phenytoin level for albumin and renal function (Sheiner-Tozer).

Convert IV drip rate from drops per minute (gtt/min) to mL/hour and vice versa.

Convert a vasoactive order written in mcg/kg/min into the pump rate in mL/hour, from patient weight and bag concentration.

Estimate the expected normal PaO2 based on patient age.

Calculate the PaO2/FiO2 ratio (P/F ratio) and classify ARDS severity by Berlin criteria.

Calculate SpO2/FiO2 ratio and equivalence to PaO2/FiO2 for non-invasive ARDS assessment.

Full Outline of UnResponsiveness (FOUR) score for coma assessment.

Grade subarachnoid hemorrhage by CT scan appearance using the Fisher scale.

Glasgow Coma Scale with pupil reactivity score (GCS-P).

Lawton Instrumental Activities of Daily Living scale for functional assessment in elderly.

Ramsay scale for level of sedation assessment (1–6).

Richmond Agitation-Sedation Scale (RASS) for ICU sedation assessment.

Riker Sedation-Agitation Scale (SAS) for ICU sedation.

Canadian Cardiovascular Society (CCS) functional classification of angina pectoris.

Aldrete and Kroulik post-anesthesia recovery score.

Eastern Cooperative Oncology Group performance status scale (0–5).

Karnofsky Performance Status scale (0–100) for assessing oncology patient function.

Palliative Performance Scale (PPS) for hospice and palliative care prognosis.

Six prognostic parameters that estimate survival in metastatic spinal disease and point toward excisional, palliative, or conservative care.

Primary tumor grade plus visceral and bone spread give a 2 to 10 score that maps onto a surgical strategy, from wide excision down to supportive care.

PaP score for 30-day survival probability in palliative cancer patients.

Predict remaining weeks in advanced cancer from bedside findings alone: performance status, intake, edema, dyspnea at rest, and delirium. No labs needed.

Calculate cumulative cigarette smoking exposure in pack-years.

Add up four ICU risk factors: a total of 3 or more flags invasive candidiasis in non-neutropenic patients and justifies an antifungal work-up.

Estimate the yearly stroke risk of non-valvular atrial fibrillation, running from roughly 1.9 percent at zero points to 18 percent at six.

Place a heart failure patient in class I through IV by how much ordinary activity it takes to bring the symptoms on.

Check the GELF markers of high tumor burden to settle whether follicular lymphoma calls for treatment now or watchful waiting.

Disease Activity Score (28 joints) with CRP for rheumatoid arthritis activity.

Disease Activity Score (28 joints) with ESR for rheumatoid arthritis activity.

ABCD2 score for stroke risk after transient ischemic attack.

Albumin, INR, mental status, systolic pressure and age combine into a 0 to 5 estimate of in-hospital death after an upper GI bleed.

Twelve physiologic variables plus age and chronic health status, scored 0 to 71, with the predicted ICU mortality attached to each band.

Five findings available within the first 24 hours flag which acute pancreatitis admissions carry the higher mortality, well before a CT severity index is usable.

Weigh temperature, white count, secretions, oxygenation, chest film and cultures into a 0 to 12 score; anything above 6 argues for treating ventilator-associated pneumonia.

Estimate in-hospital major bleeding risk in NSTE-ACS from eight variables, then weigh it against ischemic risk before choosing antithrombotics.

CURB-65 score for community-acquired pneumonia severity and mortality risk.

Add up the eight MANTRELS findings to gauge how likely acute appendicitis is, and whether to observe, image, or call surgery.

Caprini Risk Assessment for venous thromboembolism in surgical patients.

Modified Centor score for streptococcal pharyngitis probability.

Seven risk factors give a 0 to 9 stroke risk score for non-valvular atrial fibrillation, with the annual risk and the anticoagulation threshold for each sex.

Child-Pugh score for prognosis of chronic liver disease and cirrhosis.

Age, BMI, glucose status, AST/ALT, platelets and albumin give a non-invasive read on advanced fibrosis in fatty liver, with both NFS cutoffs applied.

10-year cardiovascular disease risk by Framingham equations.

10-year heart attack and stroke risk by the ACC/AHA Pooled Cohort Equations.

10- and 30-year risk of CVD, ASCVD and heart failure by the AHA PREVENT equations.

Predict chemotherapy-associated clot risk in ambulatory cancer patients from cancer site, blood counts and BMI, plus the threshold where prophylaxis is worth considering.

Lee RCRI for preoperative cardiac risk in non-cardiac surgery.

Enter prothrombin time, the lab control PT and bilirubin to get the discriminant function and see whether alcohol-associated hepatitis crosses the DF 32 steroid threshold.

Combine stool frequency, rectal bleeding, endoscopy and physician assessment into a 0 to 12 activity score, or drop the endoscopy item for the partial Mayo.

Padua score for VTE risk in hospitalized medical patients.

Five admission signs plus six at 48 hours give a mortality estimate for acute pancreatitis, with the score of 3 that flags severe disease.

Risk of Paradoxical Embolism (RoPE) score for cryptogenic stroke with PFO.

Grade rebleeding and mortality risk after an upper GI bleed, using age, shock and comorbidity alone or the complete score once endoscopy is done.

San Francisco Syncope Rule for predicting serious outcomes after syncope.

Alberta Stroke Program Early CT Score (ASPECTS) for early ischemic changes in stroke.

Seven findings put a suspected pulmonary embolism into low, moderate or high probability, so you know whether to send a D-dimer or go straight to CTA.

Ten clinical items, one of them worth minus two, give the pre-test probability of deep vein thrombosis and whether a D-dimer can settle it without ultrasound.

FIB-4 index for non-invasive liver fibrosis assessment.

Nine factors give the one-year major bleeding risk on anticoagulation for AF, and flag which of them (BP, alcohol, NSAIDs, labile INR) you can actually fix.

HEART Score for major adverse cardiac events in chest pain patients.

Model for End-Stage Liver Disease (MELD) and MELD-Na scores for cirrhosis prognosis.

National Early Warning Score 2 (NEWS 2) for clinical deterioration detection.

National Institutes of Health Stroke Scale (NIHSS) for stroke severity.

Pneumonia Severity Index (PSI/PORT) for mortality risk in community-acquired pneumonia.

Quick Sepsis-Related Organ Failure Assessment (qSOFA) for sepsis screening.

PT-INR, platelet count and a capped SOFA subscore decide whether sepsis-induced coagulopathy is present, catching it earlier than the overt DIC criteria.

Sequential Organ Failure Assessment (SOFA) score for ICU organ dysfunction.

Eight weighted variables give 30-day mortality after ST-elevation MI, from under 1 percent to well past 20, for triage and prognosis at the bedside.

Seven equal-weight criteria give the 14-day risk of death, MI or urgent revascularization in unstable angina and NSTEMI, steering the invasive versus conservative call.

GRACE score for in-hospital and 6-month mortality in acute coronary syndrome.

Arterial pH, bicarbonate and mental status grade a diabetic ketoacidosis episode mild, moderate or severe by whichever parameter is worst.

SCORAD Index for severity of atopic dermatitis.

Rate erythema, induration, scaling and area involved for head, arms, trunk and legs; the regional weights add up to a PASI from 0 to 72.

Pulmonary Embolism Severity Index (PESI) for 30-day mortality.

Four bedside signs (appearance, eyes, mucous membranes, tears) put a child with gastroenteritis on a 0 to 8 dehydration scale that guides rehydration.

Pick the highest indicator in each clinical process and the Larach scale ranks how likely an intraoperative event really was malignant hyperthermia, rank 1 to 6.

Crohn's Disease Activity Index (CDAI) for assessing Crohn's disease activity.

Bishop score for predicting successful labor induction.

Score vascular pattern, bleeding and erosions at the worst-affected segment for a 0 to 8 endoscopic index that beats the Mayo subscore on inter-observer reliability.

Weight MI timing, angina class, pulmonary edema and seven more factors into a Detsky class I to III for cardiac risk before non-cardiac surgery.

The original 1977 nine-factor index, scoring perioperative cardiac complication risk from S3 gallop, recent MI, arrhythmia and surgery type into classes I to IV.

Harvey-Bradshaw Index for Crohn's disease activity (simplified CDAI).

Grade the six body regions on the AIS scale; the three worst get squared and summed into the 0 to 75 trauma score where anything above 15 counts as major trauma.

Six yes-or-no criteria split acute PE into low risk (all absent, roughly 1 percent 30-day mortality) and high risk, the first gate for outpatient treatment.

ISS stage, high-risk FISH cytogenetics and serum LDH combine into R-ISS stage I, II or III for myeloma prognosis and trial stratification.

Eight bedside criteria that, all negative in an already low-risk patient, let you close out pulmonary embolism without a D-dimer or a scan.

Seven admission variables (BP, BUN, sodium, age, heart rate, race, COPD) map to in-hospital mortality in acute heart failure, from under 1 percent to over 50.

Total seven items to a maximum of 26; a score of 21 or more marks febrile neutropenia as low risk and opens the door to oral outpatient antibiotics.

Hemoglobin, base excess, vitals, FAST and fracture pattern give the probability that a trauma patient will need massive transfusion, so the protocol fires early.

Browse 1,035 exercises by muscle, equipment, and difficulty. Step-by-step instructions and a muscle map for every exercise — free, no sign-up.

Calculate running pace per km and per mile from distance and time, plus projected 5K, 10K, half and marathon finish times. Free, in your browser.

Calculate your pregnancy due date from LMP, conception date, or IVF transfer using Naegele’s rule, plus current gestational age and trimester.

Estimate basal metabolic rate from sex, age, height and weight, with Mifflin-St Jeor, Harris-Benedict and Katch-McArdle side by side.

Calculate total daily energy expenditure from BMR and activity level, with calorie targets for weight loss, maintenance and weight gain.

Convert CSV to JSON or JSON to CSV instantly. Auto-detects delimiters — supports comma, semicolon, and tab.

Paste a JSON array and instantly get a formatted Markdown table. Perfect for READMEs and documentation.

Paste HTML and get clean Markdown instantly. Handles headings, lists, links, images, tables, and code blocks.

Bidirectional Markdown ↔ HTML converter. Paste content and get instant output — headings, lists, links, code blocks, and more.

Encode text to Base64 or decode Base64 back to text. Also supports image to Base64.

Convert text to binary, hex, and decimal representations instantly.

Convert YAML to JSON or JSON to YAML instantly in your browser. No upload, no sign-up.

Convert XML to JSON instantly in your browser. Handles attributes, nested elements, and repeated tags.

Convert Unix timestamps to human-readable dates and vice versa, with timezone support.

Convert pixels to rem and rem to pixels instantly. Configurable base font size with a common conversions reference table.

Convert between units of length, weight, temperature, data, speed, and more. Free, instant, no sign-up.

Calculate the optimal CSS line-height for any font size. Live preview and copy-ready CSS values.

Convert between px, pt, em, rem, and percent for CSS typography. Enter any value and see all units instantly.

Convert shoe, sneaker, and tennis shoe sizes between US, UK, EU, Brazil, Japan, Mexico, Australia, and cm. Men, women, and kids — instant and free.

Convert video to text online for free. Transcribe MP4, WebM, MOV, and audio to text, SRT, or VTT in your browser — no upload, no signup.

Free online video editor — trim, compress, convert, rotate, mute, crop, and resize videos in your browser. No upload, no signup, no watermark.

Download Instagram Reels and videos in MP4 format. Paste the link, click download — free, no login, no watermark.

Complete reference for paper sizes — A series, US Letter, Legal, Tabloid, and more. Search and filter by name or dimensions.

Convert date and time between time zones instantly. Compare multiple zones side by side.

Clean CSV files online. Trim whitespace, remove empty rows, and fix line endings. Runs in your browser.

Remove duplicate rows from CSV files. Dedupe by entire row or a specific column. Instant, browser-based.

Split a CSV file into multiple files by row count. Download-ready chunks for large datasets.

Merge multiple CSV files into one. Combines headers automatically. Paste or type CSV content.

Calculate exact age in years, months, and days from a birth date. Updates to today or any target date.

Parse and format ISO 8601 dates. Convert between ISO strings, local datetime, and Unix timestamps.

Find the ISO week number for any date. See week start, week end, and year-week label.

Business Days Calculator. Free, instant, runs in your browser.

Working Hours Calculator. Free, instant, runs in your browser.

Countdown to Date Calculator. Free, instant, runs in your browser.

Excel to CSV Converter Online. Free, instant, runs in your browser.

CSV to Excel Converter Online. Free, instant, runs in your browser.

CSV Delimiter Converter. Free, instant, runs in your browser.

CSV Column Mapper & Renamer. Free, instant, runs in your browser.

Transpose CSV Online. Free, instant, runs in your browser.

Turn an animated GIF into an MP4 a fraction of the size, which is the format Twitter, Discord, and most CMS uploads actually prefer.

Pick a clip range, frame rate, and width, then export it as an animated PNG with lossless color and real alpha instead of GIF dithering.

Trim a clip range, set frame rate and output width, and export animated WebP. Sharper than a GIF at a fraction of the bytes for web embeds.

Export a clip as animated AVIF, the smallest of the modern animation formats. Start, end, frame rate, and width are all set before encoding.

Queue MP4, WebM, or MOV clips, arrange the order, and join them end to end into one continuous file you can download in a single click.

Play an MP4, WebM, or MOV clip backwards and export it. Both picture and audio are reversed, so the soundtrack runs with the footage.

Retime a clip anywhere from 0.25x to 4x and export the result, whether you want a timelapse or slow motion out of a phone recording.

Hold one frame in the middle of a clip. Pick the timestamp and how many seconds it pauses, then export the video with the freeze baked in.

Scrub to a timestamp and save that exact frame as a PNG or JPG, which beats screenshotting the player and cropping the browser chrome off.

Order a stack of photos, set the frame rate, and render them into an MP4 slideshow you can post anywhere a video file is accepted.

Convert audio to text online for free. Transcribe MP3, WAV, M4A, and more to text, SRT, or VTT in your browser — no upload, no signup.

Give a start and end time to keep one section of an MP3, WAV, or FLAC file, then download just that piece as a new track.

Pick a target bitrate and re-encode down to it. Taking a spoken-word track from 320 to 96 kbps cuts the file by roughly two thirds.

Line up MP3, WAV, or OGG tracks in whatever order you want and stitch them into a single file with no silence dropped in between.

Set fade in and fade out lengths in seconds so a track eases in and ends without a hard cut. Total duration tells it where the tail sits.

Speed a track up or slow it down, then download the retimed file. Built for lecture recordings, practice loops, and audiobook pacing.

Amplify a quiet recording by a set number of decibels and download the louder file, so an interview taken at arms length becomes audible.

Lift choppy footage to 30, 48, or 60 fps by generating the missing in-between frames with motion interpolation. Takes MP4, WebM, and MOV.

Encode video frames as JPEG XL instead of PNG or JPG, for photo quality stills at a fraction of the file size. Accepts MP4, WebM, and MOV.

Push a clip through one of three looks: vivid color, flat grayscale, or full negative. The graded video is re-encoded to MP4 on your own machine.

Take the jitter out of handheld footage. Motion is tracked across frames and the clip is re-rendered along a steadier path, no tripod required.

Burn an SRT or VTT file permanently into the picture so the captions survive re-uploads to platforms that quietly strip subtitle tracks.

Render any audio track as a 1200 by 200 pixel waveform PNG, the kind of image podcast pages, audiograms, and release posts run above the player.

Strip constant hiss, mains hum, and air conditioner rumble out of a recording, then download the cleaned voice track as an MP3.

Turn a stack of WebP files into PNGs with transparency intact, for the apps and CMSes that still refuse to read WebP.

AVIF keeps files small but half the editors out there cannot open one. Convert a batch to PNG and get images that paste anywhere.

Convert a folder of AVIF photos to JPG at the quality you choose, for uploaders and marketplaces that reject the newer format.

Flatten a batch of PNGs to JPG and set the compression level, for when screenshots and exports keep hitting an upload limit.

Convert JPG photos to PNG in one pass, so every later edit and re-save avoids stacking another round of lossy compression.

Drop in a silent clip and an audio track, set the volume, trim where the sound starts, and export an MP4 that plays with music.

Pull frames out of a video as lossless PNGs. Grab one exact moment, or export a whole sequence at the interval you set.

Take a still from a video without screen recording it. Export a single JPG or every frame at a fixed interval.

Convert square feet to square meters, acres to hectares, and every common area unit instantly. Free area converter that runs in your browser.

Convert liters to gallons, cups to milliliters, and every common volume unit instantly. Free volume converter that runs entirely in your browser.

Convert psi to bar, kPa to psi, atmospheres, torr, and mmHg instantly with NIST conversion factors. Free pressure converter, runs in your browser.

Convert joules to calories, kWh to BTU, electronvolts, and foot-pounds instantly with NIST factors. Free energy converter, runs in your browser.

Convert horsepower to kilowatts, watts to BTU/h, and tons of refrigeration instantly with NIST factors. Free power converter in your browser.

Convert newtons to pounds-force, kilograms-force, dynes, and poundals instantly with exact NIST factors. Free force converter in your browser.

Convert newton-meters to foot-pounds, inch-pounds, and kgf·m instantly with exact NIST factors. Free torque unit converter in your browser.

Convert m/s² to g-force, ft/s², Gal, and km/h per second instantly with exact NIST factors. Free acceleration unit converter in your browser.

Convert kg/m³ to g/cm³, lb/ft³, lb/in³, and kg/L instantly with exact NIST-derived factors. Free density unit converter in your browser.

Convert degrees to radians, gradians, arcminutes, arcseconds, and turns instantly. Free angle unit converter that runs entirely in your browser.

Convert hertz to kilohertz, megahertz, RPM, and radians per second instantly. Free frequency unit converter that runs entirely in your browser.

Convert Mbps to MB/s, Gbps to Mbps, and MiB/s instantly — decimal and binary prefixes handled correctly. Free bandwidth converter in your browser.

Convert moles to millimoles, micromoles, kilomoles, and pound-moles instantly. Free amount-of-substance converter that runs in your browser.

Convert molar mass between g/mol, kg/mol, kg/kmol, daltons, and lb/lb-mol instantly. Free molar mass unit converter that runs in your browser.

Convert dynamic viscosity between Pa·s, poise, centipoise, and lbf·s/ft² instantly with NIST factors. Free viscosity converter in your browser.

Convert kinematic viscosity between m²/s, stokes, centistokes, and ft²/s instantly with exact NIST factors. Free viscosity converter in your browser.

Convert mass flow between kg/s, kg/h, tonnes per hour, lb/s, and lb/h instantly with exact NIST factors. Free flow rate converter in your browser.

Convert volumetric flow between L/min, GPM, CFM, m³/h, and L/s instantly with exact NIST factors. Free flow rate converter in your browser.

Convert capacitance between farads, microfarads, nanofarads, and picofarads instantly. Free capacitance unit converter that runs in your browser.

Convert electric charge between coulombs, ampere-hours, and milliamp-hours instantly. Free charge unit converter for battery and electronics work.

Convert electric current between amps, milliamps, microamps, and kiloamps instantly. Free current unit converter that runs in your browser.

Convert electric potential between volts, millivolts, microvolts, kilovolts, and megavolts instantly. Free voltage unit converter in your browser.

Convert electrical conductance between siemens, millisiemens, microsiemens, and mho instantly. Free conductance unit converter in your browser.

Convert electrical resistance between ohms, kiloohms, megaohms, and gigaohms instantly. Free resistance unit converter that runs in your browser.

Convert inductance between henries, millihenries, microhenries, and nanohenries instantly. Free inductance unit converter that runs in your browser.

Convert magnetic flux density between tesla, gauss, millitesla, and gamma instantly — 1 T = 10,000 G exactly. Free converter in your browser.

Convert magnetic field strength H between amperes per meter and oersteds instantly — 1 Oe = 1000/4π A/m. Free converter in your browser.

Convert magnetic flux between webers, milliwebers, and maxwells instantly — 1 Wb = 10⁸ Mx exactly. Free flux unit converter in your browser.

Convert magnetomotive force between ampere-turns and gilberts instantly — 1 Gb = 10/4π At exactly. Free MMF unit converter in your browser.

Convert illuminance between lux, foot-candles, and phots instantly — 1 fc = 10.764 lx exactly. Free lighting unit converter in your browser.

Convert luminance between cd/m² (nits), foot-lamberts, stilbs, and lamberts instantly with exact NIST factors. Free converter in your browser.

Convert luminous energy between lumen-seconds, talbots, lumen-minutes, and lumen-hours instantly. Free photometry unit converter in your browser.

Convert luminous flux between lumens, kilolumens, millilumens, and candela-steradians instantly. Free photometry unit converter in your browser.

Convert luminous intensity between candela, millicandela, and candlepower instantly — LED mcd ratings included. Free converter in your browser.

Convert absorbed radiation dose between grays, milligrays, and rads instantly — 1 Gy = 100 rad exactly. Free dose unit converter in your browser.

Convert equivalent radiation dose between sieverts, millisieverts, and rems instantly — 1 Sv = 100 rem exactly. Free converter in your browser.

Convert radioactivity between becquerels, megabecquerels, curies, and millicuries instantly — 1 Ci = 3.7×10¹⁰ Bq. Free converter in your browser.

Convert fuel economy between US MPG, UK MPG, L/100km, and km/L instantly. Free fuel consumption converter that runs entirely in your browser.

Convert wind speed between knots, mph, km/h, and m/s and read the Beaufort scale force with description. Free wind converter in your browser.

Enter a tire size like 205/55R16 to get diameter, sidewall, and circumference — and compare two sizes with speedometer error. Free, in-browser.

Turn a diagonal size and aspect ratio into real width, height, area, and PPI for TVs and monitors — inches and centimeters. Free, in-browser.

Convert clothing sizes between US, UK, EU, Italian, and Japanese charts for women’s dresses, men’s suits, and shirts. Free, in your browser.

Convert hat sizes between head circumference in cm or inches, US and UK numeric sizes, and S/M/L letters. Free hat size converter in your browser.

Count the days between two dates, with a years-months-days breakdown, weeks, hours, and business days that skip weekends.

Test regular expressions with live match highlighting.

Format, minify and validate JSON instantly.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input instantly.

Decode and inspect JWT tokens instantly — view header, payload, and signature.

Hash passwords with bcrypt in your browser. Choose cost factor, generate secure hashes, and verify passwords. No upload — runs locally.

Generate cryptographically secure passwords with custom length, character sets, and strength check. Fully offline — no data ever leaves your browser.

Generate HTML meta tags for SEO and social sharing. Covers title, description, canonical, Open Graph, and Twitter Card tags.

Generate a valid robots.txt file for your website. Control which bots can crawl your pages, block AI scrapers, and add your sitemap URL.

Generate JSON-LD structured data for Article, Product, FAQ, HowTo, LocalBusiness, and more. Copy and paste into your HTML head.

Paste page HTML to audit title, description, canonical, Open Graph, and Twitter tags. Paste-only — cannot fetch live URLs.

Preview how your page looks when shared on social — paste HTML or enter OG fields manually. Cannot fetch live URLs.

Paste robots.txt and test if a URL path is allowed or blocked for a crawler. Paste-only — cannot fetch live robots.txt.

Paste sitemap XML to validate structure, URLs, and duplicates. Does not fetch live sitemaps or check HTTP status codes.

Paste JSON-LD to validate syntax and required schema.org fields. Paste-only — cannot fetch live pages or replace Google Rich Results Test.

Generate cryptographically secure API keys in hex, base64, or alphanumeric formats. Runs offline in your browser.

Generate one or many UUIDs instantly — supports v1, v4, and v5.

Build and decode cron expressions with a visual editor.

Convert numbers between decimal, hexadecimal, binary, and octal instantly. Supports integers and fractions.

Estimate per-request cost for GPT-4o, Claude, Gemini, and more. Enter token counts and see input, output, and total pricing.

Quick reference for Tailwind CSS classes — spacing, typography, colors, flexbox, grid, and more. Search and copy any class.

Format and beautify SQL queries instantly. Paste messy SQL and get indented, readable output.

Build cURL commands from URL, method, headers, and body. Copy-ready curl for any HTTP request.

Check password strength with entropy scoring and crack-time estimates. See what makes a password weak or strong.

Generate HMAC signatures with SHA-256, SHA-384, or SHA-512. Enter message and secret key — runs in your browser.

See how much of a model context window your text uses. Compare GPT-4o, Claude, and Gemini token limits.

Compare two JSON documents and highlight added, removed, and changed keys. Formatted side-by-side diff.

Convert cURL commands to JavaScript fetch() code. Paste curl and get copy-ready fetch syntax.

Convert cURL commands to Python requests code. Paste curl and get copy-ready Python.

Generate Postman Collection v2.1 JSON from URL, method, headers, and body. Import directly into Postman.

Validate JSON data against a JSON Schema. Paste instance and schema to see errors instantly.

Test prompt templates with variables. Enter {{placeholders}} and preview the filled prompt instantly.

Estimate embedding API costs for OpenAI, Cohere, and Voyage. Enter token count and see per-request pricing.

Minify SQL queries online. Remove comments and whitespace for smaller payloads. Free SQL minifier, runs in your browser.

Generate SQL INSERT statements from JSON arrays. Paste JSON and get copy-ready INSERT queries. Free, runs in your browser.

Generate CREATE TABLE SQL from JSON schema or sample rows. Infer column types instantly. Free browser tool.

Calculate RAG chunk count from token total, chunk size, and overlap. Plan vector indexing splits in your browser.

Compare LLM API costs across OpenAI, Claude, and Gemini for the same token counts. Free browser calculator.

Extract JSON from LLM responses. Parse fenced code blocks and inline objects from pasted model output.

Identify hash types from pasted digests. Detect MD5, SHA-256, bcrypt, and more. Paste only, runs in browser.

Validate IBAN numbers with mod-97 check digits. Paste an IBAN to verify format and checksum. Free browser tool.

Validate numbers with the Luhn algorithm. Check credit card and identifier check digits. Paste only, in browser.

Audit pasted JWT tokens for security issues. Flag alg none, expiry, and missing claims. Runs in your browser.

Minify HTML by removing comments and extra whitespace. Paste HTML and copy compressed output. Runs in browser.

Beautify and indent pasted HTML for readability. Format messy markup instantly. Free, runs in your browser.

Minify CSS stylesheets online. Remove comments and whitespace from pasted CSS. Free browser minifier.

Parse URLs into protocol, host, path, query, and hash components. Paste any URL for instant breakdown.

Vision Image Token Estimator. Free, instant, runs in your browser.

JSON Schema Generator from JSON. Free, instant, runs in your browser.

Clean Up Markdown Text Online. Free, instant, runs in your browser.

Compare Two Prompts — Prompt Diff. Free, instant, runs in your browser.

Compare Prompt Versions. Free, instant, runs in your browser.

Format AI Output — JSON & Markdown. Free, instant, runs in your browser.

SQL Query Builder — SELECT Generator. Free, instant, runs in your browser.

Convert CSV to SQL INSERT Statements. Free, instant, runs in your browser.

Convert SQL INSERT to CSV. Free, instant, runs in your browser.

ER Diagram Generator from Schema. Free, instant, runs in your browser.

Convert MongoDB JSON to SQL. Free, instant, runs in your browser.

HTTP Request Builder — Raw & cURL. Free, instant, runs in your browser.

API Mock JSON Response Generator. Free, instant, runs in your browser.

Webhook Payload Inspector. Free, instant, runs in your browser.

Compare Two Hashes Online. Free, instant, runs in your browser.

Checksum Calculator — SHA-256 & More. Free, instant, runs in your browser.

SSL Certificate Decoder — Paste PEM. Free, instant, runs in your browser.

CSR Generator — RSA Key Pair. Free, instant, runs in your browser.

PEM Decoder — Parse PEM Blocks. Free, instant, runs in your browser.

Certificate Expiration Checker. Free, instant, runs in your browser.

HTML Preview Online. Free, instant, runs in your browser.

CSS Beautifier Online. Free, instant, runs in your browser.

JavaScript Minifier Online. Free, instant, runs in your browser.

HTML Structure Validator. Free, instant, runs in your browser.

CSS Grid Generator. Free, instant, runs in your browser.

Flexbox CSS Generator. Free, instant, runs in your browser.

SVG Viewer & Editor Online. Free, instant, runs in your browser.

CSV Diff — Compare Two CSV Files. Free, instant, runs in your browser.

XML Validator Online. Free, instant, runs in your browser.

YAML Validator Online. Free, instant, runs in your browser.

TOML to JSON Converter. Free, instant, runs in your browser.

XML Formatter Online. Free, instant, runs in your browser.

JSON Flatten — Nested to Dot Notation. Free, instant, runs in your browser.

JSON Path Tester Online. Free, instant, runs in your browser.

Escape HTML special characters to entities or decode them back, covering named, decimal, and hexadecimal references without touching innerHTML.

Pick random numbers in any range using the browser cryptographic random source. Integers or decimals, with or without repeats.

Turn a headline into a URL-safe slug: accents folded to ASCII, punctuation dropped, optional stop-word removal, and truncation on a word boundary.

Percent-encode text for a URL or decode %20 and %C3%A9 back to readable characters, with a toggle between encodeURIComponent and encodeURI.

Upload images and create animated GIFs instantly in your browser. Drag to reorder frames, set speed, and download — no upload to servers.

Remove the background from any GIF and make it transparent. Pick a color, adjust tolerance, download — 100% in your browser.

Compress JPG, PNG, and WebP images in your browser. Side-by-side preview, savings %, EXIF strip — no upload, no watermark.

Optimize and minify SVG files in the browser. Remove metadata, clean attributes, and reduce file size instantly.

Generate favicons in all sizes from a single image. Download as ICO, PNG, or a complete ZIP with all sizes.

Split any image into a grid of tiles. Choose rows and columns, preview the result, and download all tiles as a ZIP.

Generate placeholder images with custom dimensions, colors, and text. Download as PNG — no sign-up required.

Add text or image watermarks to photos in your browser. Adjust opacity, position, size, and rotation. No upload to servers.

Convert raster images (PNG, JPEG) to SVG vector graphics. Adjust detail, colors, and smoothing. Runs in your browser.

Crop and resize images for Instagram, Bluesky, Threads, Twitter/X, and more. Preset aspect ratios for every platform.

Put non-square images on a square matte with custom background color. Perfect for Instagram grid posts.

Split a wide or tall image into seamless carousel slides for Instagram. Download all slides as a ZIP.

Paste a Base64 string or data URL and instantly preview the image with format, dimensions, and size.

Inspect animated GIF internals: dimensions, frame count, delays, palettes, and disposal methods. Export metadata as JSON.

Flip the frame order of an animated GIF so it plays backwards, keeping the original size and per-frame timing intact.

Set a speed percentage and the frame delays get rewritten, so the animation runs faster or slower without re-encoding a single pixel.

Type a start and end time in seconds and keep only the frames in between, trimming a long animation down to the part that matters.

Enter a new width and every frame is scaled to match, so the animation survives the resize. Leave height blank to hold the aspect ratio.

Set an X, Y, width, and height crop box and every frame gets cut to it. Handy for chopping black bars or a corner watermark off a loop.

Turn an animation 90, 180, or 270 degrees, or mirror it horizontally or vertically. All frames rotate together so the loop stays in sync.

Append the reversed frames to the end so the animation runs forward then back, giving a boomerang loop with no visible jump at the seam.

Scramble the frame order for a glitchy remix of an animation. Each frame keeps its own delay, only the sequence gets shuffled.

Give a target length in seconds and the loop repeats until it gets there, for when a two-second clip has to fill a fixed slot.

Re-encode an animated GIF as animated WebP, which usually lands under half the file size while keeping the same frames and timing.

Move an animation to APNG when 256 colors and hard-edged transparency are not enough. APNG carries full alpha and 24-bit color per frame.

Give a single photo a zoom, pan, or pulse move and export it as a looping GIF. Frame count and delay control how slow the motion reads.

Enter the rows and columns of a sprite sheet and it gets sliced on that grid into separate PNG tiles at the original pixel size.

Redraw a photo without its EXIF block, dropping GPS coordinates, camera model, and capture time before you post it. The pixels stay untouched.

Drop two images and get them laid out side by side at full resolution on one canvas, which makes before and after differences easy to spot.

Combine photos into a horizontal strip, a vertical stack, or a 2x2 grid with an adjustable gap, then save the whole arrangement as one image.

Clip an image into a rounded rectangle. Set the corner radius anywhere from 1 to 50 percent and get a PNG back with the corners knocked out transparent.

Fit a headshot to the US 2 by 2 inch or EU 35 by 45 mm passport size, centered on white at print resolution and ready to send to a photo lab.

Stack a set of images into an animated PNG, or hand it a single photo and let a zoom, pan, or pulse motion generate the frames for you.

Turn a stack of images into an endlessly looping animated WebP at the frame delay you choose, and land a much smaller file than the same GIF.

Set how many times an animated GIF repeats before it stops. Enter 0 to loop forever, 1 to play once and freeze, or any count in between.

Break an animated GIF back into its individual frames, review every one as a thumbnail, and save them all as numbered PNG files in one click.

Merge two animated GIFs into one, side by side or stacked. The shorter clip loops so both keep playing until the longer one finishes.

Lay a caption bar across the bottom of every frame of a GIF. Type the line, pick the font size, and export the meme in one pass.

Recolor every frame of a GIF at once with grayscale, sepia, invert, or blur, then re-encode the animation with the new look baked in.

Read what an image file actually is before you use it: format, exact byte size, and pixel dimensions, all without the photo leaving your machine.

Scale a photo up to four times its original size with high quality resampling. Set the percentage, check the preview, and save the bigger file.

Redraw a photo as black dots on white, the way newspapers used to print pictures. Dial the dot density from coarse and punchy to fine and subtle.

Reshape a photo to 16:9, 1:1, or any ratio you type in. Letterbox mode pads the gaps with white, crop mode trims whatever hangs over the edge.

Assemble a set of images into an animated JPEG XL, or animate one photo with zoom and pan motion. Set the frame delay, then download the file.

Build a looping animated AVIF from a batch of images. Same motion as a GIF at a fraction of the byte count, with full color instead of 256.

Swap an animated GIF for a JPEG XL that carries the same picture in far fewer bytes. Drop the file in, wait for the encode, take the result.

Encode a PNG, JPG, SVG, or WebP as a base64 data URI you can paste straight into a CSS background or an img src. One less HTTP request.

Pull the MOV half out of an iPhone Live Photo and hand back a GIF that posts anywhere. Output runs 480 pixels wide at 10 frames per second.

Animated WebP still breaks on older forums and chat clients. Feed one in and take away a plain GIF, 480 pixels wide at 10 frames per second.

AVIF animations compress beautifully and play almost nowhere. Decode one here and get a GIF back at 480 pixels wide and 10 frames per second.

APNG keeps full color and alpha, but plenty of apps only read GIF. Decode the animated PNG and download a 480 pixel wide GIF at 10 fps.

MNG is a dead animation format that almost no viewer opens today. Drop the old file in and get a standard GIF, 480 pixels wide at 10 fps.

Lay every frame of an animated GIF out in a single grid image, ready for a CSS sprite animation or a game engine atlas.

Cut a long animated GIF into smaller pieces by frame range and download each part on its own.

Rebuild a GIF that stopped animating. Re-encode the frames, reset the loop flag, and download a copy players will actually open.

Crop and resize an animated GIF to the 1:1 square Instagram expects, then download it sized and ready to post.

Put the classic white caption bar above a GIF instead of over it, so the text stays readable and the frame stays uncovered.

Telegram animated stickers ship as .tgs Lottie files that almost nothing else opens. Drop one in and get a shareable GIF back.

Android phones hide a short video clip inside MVIMG motion photos. Extract it and export the movement as a plain GIF anyone can view.

Turn an animated GIF into a MOV clip the iPhone Photos app accepts as a Live Photo, wallpaper and lock screen included.

Crop a photo with a draggable selection box, exact X, Y, width and height fields, and an optional 1:1, 4:3, 16:9, or 3:2 ratio lock.

Convert iPhone HEIC and HEIF photos to JPG in batches, with a quality slider and the size saved on every file.

Resize an image to an exact width and height, or scale by percent. Aspect-ratio lock, common presets, and a live output size estimate.

Rotate a photo by 90 degree steps or any free angle, and mirror it horizontally or vertically. The canvas grows so no corner is clipped.

Rasterize SVG markup or an SVG file to PNG at any width and height, with retina multipliers and a transparent background.

Calculate gross profit, net profit, and margin percentage from revenue and costs. Updates instantly.

Find your break-even point in units and revenue. Enter fixed costs, price per unit, and variable cost per unit.

Add or remove VAT and sales tax from any amount. Preset rates for US, UK, EU, and custom percentage.

Convert salary between annual, monthly, bi-weekly, weekly, daily, and hourly rates. Adjust for hours and weeks worked.

Calculate return on investment percentage from initial cost and final value. See profit and ROI instantly.

Estimate Amazon referral fees, FBA fees, and net profit per sale. Enter price, category, and fulfillment method.

Calculate Etsy listing, transaction, payment processing, and shipping fees. See net profit per sale instantly.

Calculate sales commission from deal value and commission rate. Supports flat rate and tiered percentages.

Convert desired annual salary to an hourly contractor rate. Factor in billable hours, expenses, and tax buffer.

Calculate selling price from cost and markup or margin. See profit per unit instantly.

Calculate invoice due dates from issue date and payment terms. Net 30, Net 60, or custom days.

Calculate final price after stacked Shopify discounts. Enter original price and multiple discount percentages.

Validate GTIN, EAN-13, and UPC barcodes. Verify check digits and format. Free, runs in your browser.

Generate Invoice Numbers Online. Free, instant, runs in your browser.

Generate Purchase Order Online. Free, instant, runs in your browser.

Generate Business Name Ideas. Free, instant, runs in your browser.

Currency Margin Calculator. Free, instant, runs in your browser.

Shipping Cost Calculator. Free, instant, runs in your browser.

SKU Generator Online. Free, instant, runs in your browser.

Compare two blocks of text and highlight added, removed, and unchanged lines.

Estimate how long it takes to read any text — shows slow, average, and fast reading times.

Count AI tokens for GPT-4o, Claude, Gemini, and more. Paste text and see estimated token, word, and character counts instantly.

Upload any OTF or TTF font file and inspect its metadata, character set, OpenType features, and glyph table.

Write markdown and preview the output in real time.

Build Markdown tables visually with a grid editor. Set alignment, add rows and columns, copy the output.

A quick text editor with find & replace, case transforms (uppercase, lowercase, title case), slug generation, and more.

Browse, search, and copy Unicode characters by category. Find arrows, math symbols, emojis, and special glyphs instantly.

Generate lorem ipsum placeholder text instantly.

Generate Mussum Ipsum placeholder text — a Brazilian lorem ipsum full of invented words and humor.

Generate Dilmes Ipsum placeholder text using real quotes from former Brazilian president Dilma Rousseff.

Click any emoji to instantly copy it to your clipboard. Search and browse 2,300+ Unicode emojis by category.

Count words, characters, sentences, and paragraphs in real time. Paste or type any text.

Run several line transforms on one paste without switching tabs. Sort, dedupe, shuffle, and change case in a single pass over the same text.

Convert text to uppercase, lowercase, title case, sentence case, camelCase, snake_case, kebab-case, and CONSTANT_CASE as you type.

Remove duplicate lines from a list keeping the first or last copy, or show only the duplicates, with a count of how many lines were dropped.

Alphabetize a list A to Z or Z to A, sort it numerically or by line length, reverse it, or shuffle it, with natural sort so item2 comes before item10.

Calculate monthly mortgage payments, total interest, and full amortization schedule. Enter loan amount, rate, and term.

Calculate monthly loan payments and total interest for personal, auto, or business loans. See full amortization schedule.

Calculate compound interest with monthly contributions. See balance growth over time with a year-by-year breakdown.

Calculate compound annual growth rate between two values over any time period. Instant CAGR percentage.

Calculate years to financial independence using the 4% rule. Enter savings, expenses, income, and savings rate.

See how inflation erodes purchasing power. Enter an amount and year range using historical US CPI data.

Calculate weighted average share price across multiple purchases. Enter shares and price per lot.

Model dollar-cost averaging with recurring investments. See average cost per share and total invested.

DCF Calculator — Discounted Cash Flow NPV. Free, instant, runs in your browser.

Position Size Calculator — Risk per Trade. Free, instant, runs in your browser.

Crypto Profit Calculator. Free, instant, runs in your browser.

Calculate simple interest with I = P·r·t. Enter principal, rate, and time in years, months, or days — compare against annual compounding.

See how long paying off a credit card takes and what it costs. Compare your monthly payment against minimum payments at your APR.

Find your loan payoff date and what extra monthly payments save — months cut and interest saved, side by side with your current plan.

Should you refinance? Compare current vs new rate and term: monthly savings, break-even point on closing costs, and lifetime savings.

Plan your debt-free date. List balances, APRs, and minimums, add an extra budget, and compare snowball vs avalanche strategies.

Compare renting vs buying a home over your time horizon — mortgage, taxes, maintenance, and appreciation against rent growth and investing.

Extract text from any PDF file instantly in your browser. No upload to servers — runs 100% locally.

Convert PDF files to clean Markdown with heading detection. Ideal for LLM context and documentation.

Convert PDF to editable PowerPoint slides — text, images and shapes, not screenshots. Runs 100% in your browser.

Drop JPG, PNG, or WebP files, set the page order, then export one PDF with a page per image. Choose A4, Letter, or fit-to-image, plus margins.

Rearrange PDF pages online — drag to reorder, rotate pages 90°, and delete pages you don't need. Free, runs in your browser with no upload needed.

Arrange PDF pages for booklet, saddle-stitch, or N-up printing. Runs entirely in your browser — no upload required.

Create an 8-page mini-zine imposition layout from a single sheet of paper. Upload a PDF and download the print-ready layout.

View PDF page count, file size, author, creation date, and other metadata instantly in your browser.

Check if your PDF has accessibility tags, document title, language, and other a11y requirements.

Analyze PDF files for print-readiness issues — check page sizes, fonts, color spaces, and image resolution.

Shrink a PDF until it clears an email or upload cap. The document is rebuilt with compact object streams, and it never leaves your machine.

Flip through a document as an animated GIF. Give it a page range like 1,3-5 and every page becomes one frame in the loop.

Render document pages as JPG images. Type a page range or leave the box blank for everything, then save the pages as separate files.

Render document pages as lossless PNGs, which keeps text edges and line art sharp where JPG would smear them. Export one page or all of them.

Trim the dead margins off scanned pages so the text fills a tablet or e-reader screen. Pick the area to keep once, apply it to every page.

Full-featured scientific calculator with trigonometry, logarithms, exponents, and expression history.

Plot mathematical functions on an interactive graph. Supports multiple equations, zoom, pan, and real-time updates.

Simplify expressions, factor polynomials, solve equations, and compute derivatives. Renders math with LaTeX.

Calculate percentages, increases, decreases, proportions, and find original values before percentage changes. 9 calculation types.

Calculate GPA from letter grades and credit hours on a 4.0 scale. Add courses and see weighted GPA instantly.

Calculate weighted course grade from assignment scores and weights. See your overall percentage instantly.

Calculate the final exam score you need to reach your target course grade. Enter current grade and final weight.

Estimate reading grade level with Flesch-Kincaid. Paste text to see grade level, reading ease, and word count.

Citation Generator — APA & MLA. Free, instant, runs in your browser.

Flashcard Formatter — Q&A to Markdown. Free, instant, runs in your browser.

APA to MLA Citation Converter. Free, instant, runs in your browser.

Roman Numeral Converter. Free, instant, runs in your browser.

Translate Excel function names between English, Portuguese, and Spanish. Search 375 functions — VLOOKUP is PROCV in pt-BR, BUSCARV in Spanish.

Generate CSS gradients visually with live preview.

Generate color shades and Tailwind CSS palettes from a single hex color. Export as CSS variables, Tailwind config, or design tokens.

Generate beautiful color palettes with 28 strategies — color theory, moods, decades, nature, and culture. Lock, export, download.

Generate a full Tailwind CSS color palette (50-950) from any hex color. Export as CSS variables or Tailwind config.

Generate complementary, triadic, analogous, split-complementary, and more color harmonies from any base color.

Browse a curated collection of beautiful color palettes. Filter by mood, search by color, and copy hex values instantly.

Convert colors between HEX, RGB, HSL, OKLCH, and LAB formats instantly. Includes a live color picker preview.

Check color contrast ratios for WCAG AA and AAA compliance. Test foreground and background colors for accessibility.

Preview how colors and images appear to people with color blindness — protanopia, deuteranopia, tritanopia, and more.

Create realistic WhatsApp chat screenshots. Edit messages inline, toggle dark mode, download as PNG.

Create realistic iMessage chat screenshots. Blue and gray bubbles, delivered/read receipts, download as PNG.

Create realistic Discord chat screenshots. Server-style messages with avatars, timestamps, and reactions.

Create realistic Instagram DM screenshots. Purple gradient header, heart reactions, disappearing messages.

Create realistic ChatGPT conversation screenshots. User prompts and AI responses with the official ChatGPT UI.

Create realistic Instagram post screenshots. Profile, caption, likes, comments, and image placeholders.

Create realistic X/Twitter post screenshots. Profile, tweet text, likes, retweets, and reply counts.

Create realistic Gmail email screenshots. From, to, subject, body with the official Gmail UI.

Generate barcodes in Code 128, EAN-13, UPC-A, QR, Data Matrix, and more. Download as PNG or SVG.

Generate styled QR codes with custom colors, shapes, and logos. Download as PNG or SVG.

Build UTM-tagged URLs for Google Analytics campaign tracking. Add source, medium, and campaign parameters to any link.

Calculate A/B test statistical significance. Enter control and variant visitors and conversions to see p-value, lift, and significance.

Calculate marketing campaign ROI, ROAS, and profit. Enter revenue and ad spend for instant results.

Calculate customer acquisition cost, lifetime value, LTV:CAC ratio, and payback period for your marketing funnel.

YouTube Timestamp Link Generator. Free, instant, runs in your browser.