All tools

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

ABCD2 score for stroke risk after transient ischemic attack.

Add Audio to Video Online. Runs in your browser — no upload, no watermark.

Add Freeze Frame to Video Online. Runs in your browser — no upload, no watermark.

Add Subtitles to Video Online. Runs in your browser — no upload, no watermark.

Add text overlays and captions to animated GIFs in your browser. Pick fonts, colors, position, and download — no upload, no watermark.

Add Text to GIF Online. Runs in your browser — no upload, no watermark.

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

Add White Box Caption to GIF. Runs in your browser — no upload, no watermark.

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

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

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

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

AIMS65 score for predicting in-hospital mortality in upper GI bleeding.

Aldrete and Kroulik post-anesthesia recovery score.

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

Alvarado score for clinical probability of acute appendicitis.

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

Turn a still image into an animated GIF with zoom, pan, bounce, rotate, or fade effects. Set duration and FPS, then download.

Animate Static Image Online. Runs in your browser — no upload, no watermark.

Animated JXL Maker Online. Runs in your browser — no upload, no watermark.

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

Acute Physiology and Chronic Health Evaluation II (APACHE II) for ICU mortality.

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

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

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

APNG Maker. Runs in your browser — no upload, no watermark.

Apply Video Filters Online. Runs in your browser — no upload, no watermark.

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

Audio Fade In Out Online. Runs in your browser — no upload, no watermark.

Audio Waveform Image Generator. Runs in your browser — no upload, no watermark.

AVIF Animation Maker Online. Runs in your browser — no upload, no watermark.

Remove image backgrounds instantly in your browser using AI. No upload, no sign-up — powered by a local ML model.

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

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

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

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

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

Calculate bicarbonate replacement dose for severe metabolic acidosis.

Bedside Index for Severity in Acute Pancreatitis (BISAP) for mortality risk.

Bishop score for predicting successful labor induction.

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

Boost Audio Volume Online. Runs in your browser — no upload, no watermark.

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

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

Bulk AVIF to JPG Converter. Runs in your browser — no upload, no watermark.

Bulk AVIF to PNG Converter. Runs in your browser — no upload, no watermark.

Bulk JPG to PNG Converter. Runs in your browser — no upload, no watermark.

Bulk PNG to JPG Converter. Runs in your browser — no upload, no watermark.

Bulk WebP to PNG Converter. Runs in your browser — no upload, no watermark.

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

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

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

Correct total serum calcium for hypoalbuminemia.

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

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

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

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

Candida Score for identifying ICU patients who may benefit from antifungal therapy.

Caprini Risk Assessment for venous thromboembolism in surgical patients.

Estimate gestational age in newborns using neurological features (Capurro method).

Estimate gestational age in newborns using somatic features (Capurro method).

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

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

Pixelate or blur specific areas of images and GIFs. Draw rectangles over faces or sensitive content, then download.

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

CHA2DS2-VASc score for stroke risk in non-valvular atrial fibrillation.

CHADS2 score for stroke risk in non-valvular atrial fibrillation.

Change Audio Speed Online. Runs in your browser — no upload, no watermark.

Change GIF Loop Count Online. Runs in your browser — no upload, no watermark.

Change GIF Speed Online. Runs in your browser — no upload, no watermark.

Change Image Aspect Ratio Online. Runs in your browser — no upload, no watermark.

Change Video Speed Online. Runs in your browser — no upload, no watermark.

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

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

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

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

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

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

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

CPIS for diagnosis of ventilator-associated pneumonia.

Estimate creatinine clearance using the Cockcroft-Gault formula.

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

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

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

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

Merge two or more GIFs into one animation — side by side or stacked. Align timing and download the combined GIF.

Combine GIFs Side by Side Online. Runs in your browser — no upload, no watermark.

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

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

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

Compare Two Images Online. Runs in your browser — no upload, no watermark.

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

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

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

Compress Audio Online. Runs in your browser — no upload, no watermark.

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

Compress PDF Online. Runs in your browser — no upload, no watermark.

Compress MP4, WebM, and MOV videos to a smaller file size. Choose a quality preset, runs entirely in your browser.

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

Convert animated WebP images to MP4 video in your browser. Adjust quality and resolution, batch convert, then download.

Convert APNG to GIF Online. Runs in your browser — no upload, no watermark.

Convert AVIF to GIF Online. Runs in your browser — no upload, no watermark.

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

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

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

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.

Convert EPUB e-books to PDF, HTML, or plain text. Preview chapters and download — runs in your browser, no upload.

Convert GIF to APNG Online. Runs in your browser — no upload, no watermark.

Convert GIF to JXL Online. Runs in your browser — no upload, no watermark.

Convert GIF to MP4 Online. Runs in your browser — no upload, no watermark.

Convert GIF to WebP Online. Runs in your browser — no upload, no watermark.

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

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

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

Convert MNG (Multiple-image Network Graphics) to APNG in your browser. Preserves frames and timing — no upload, no watermark.

Convert MNG to GIF Online. Runs in your browser — no upload, no watermark.

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

Convert MOV (QuickTime) files to MP4 directly in your browser. Lossless when possible — no upload, no watermark, no signup.

Extract audio from MP4, WebM, or MOV videos and download as MP3. Runs in your browser — no upload, no signup, no watermark.

Convert MP4 video files to WebM in your browser. No upload, no watermark, no signup — runs entirely on your device.

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

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

Convert WebP to GIF Online. Runs in your browser — no upload, no watermark.

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

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

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

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

Stratify Covid-19 severity by clinical and laboratory criteria.

Build and decode cron expressions with a visual editor.

Crop GIF Online. Runs in your browser — no upload, no watermark.

Crop PDF Pages Online. Runs in your browser — no upload, no watermark.

Crop MP4, WebM, and MOV videos in your browser. Drag a crop box, pick an aspect ratio — no upload, no watermark, no signup.

CRUSADE score for in-hospital major bleeding risk after NSTEMI.

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

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

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

Generate CSS gradients visually with live preview.

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

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

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

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

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

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

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

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

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

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

Cut Audio Online. Runs in your browser — no upload, no watermark.

Cut GIF Duration Online. Runs in your browser — no upload, no watermark.

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

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

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

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

Detsky modified multifactorial cardiac risk index for non-cardiac surgery.

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

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

Classify diabetic ketoacidosis severity (mild, moderate, severe).

Convert DOCX, EPUB, ODT, HTML, Markdown, RTF, CSV, and JSON with Pandoc WASM in your browser. Upload, pick a format, preview, and download.

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

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

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

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

Enlarge Image Online. Runs in your browser — no upload, no watermark.

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

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

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

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

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

Extend GIF Duration. Runs in your browser — no upload, no watermark.

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

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

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

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

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

Convert 180+ image formats, audio, video, and documents in your browser. ImageMagick, FFmpeg, and Pandoc WASM — all processing runs locally.

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

Score severity of neonatal abstinence syndrome using the Finnegan scale.

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

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

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

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

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

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

Format, minify and validate JSON instantly.

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

Change video frame rate (FPS) online — convert between 24, 30, 60 fps and more. Runs entirely in your browser.

Differentiate prerenal from intrinsic acute kidney injury using FENa.

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

10-year cardiovascular disease risk by Framingham equations.

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

GELF criteria for high tumor burden in follicular lymphoma.

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

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

Generate lorem ipsum placeholder text instantly.

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

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

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

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

Calculate gestational age and due date from ultrasound biometry.

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

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

Compress GIF files and reduce their size in your browser. Cut colors, resize, drop frames — no upload, no watermark, no signup.

GIF Effects. Runs in your browser — no upload, no watermark.

GIF Frame Interpolation. Runs in your browser — no upload, no watermark.

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

Overlay a static image or another GIF on top of an animated GIF. Drag to position, resize, set opacity, and download.

GIF to Frames. Runs in your browser — no upload, no watermark.

GIF to Live Photo Converter. Runs in your browser — no upload, no watermark.

GIF to Sprite Sheet Online. Runs in your browser — no upload, no watermark.

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

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

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

Goldman multifactorial cardiac risk index for non-cardiac surgery.

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

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

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

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

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

Get With The Guidelines Heart Failure (GWTG-HF) in-hospital mortality risk.

Apply halftone dot, line, or diamond patterns to images and GIFs. Black & white or colored halftone — preview and download.

Halftone Image Effect Online. Runs in your browser — no upload, no watermark.

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

HAS-BLED bleeding risk score for patients on anticoagulation for AF.

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

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

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

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

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

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

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

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

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

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

Estimate the expected normal PaO2 based on patient age.

Generate alt text for images using AI — runs locally in your browser. No upload, no sign-up required.

Convert HEIC to PNG, JPEG, or WebP — plus PNG, JPEG, WebP, and AVIF. Resize, adjust quality, and download — all in your browser.

Image to Data URI Converter. Runs in your browser — no upload, no watermark.

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

Images to Video. Runs in your browser — no upload, no watermark.

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

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

Injury Severity Score (ISS) for trauma anatomical severity.

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

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

Instagram GIF Maker. Runs in your browser — no upload, no watermark.

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

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

Invert or negate colors in images and animated GIFs. Full inversion or per-channel control. Preview and download instantly.

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

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.

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

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

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

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

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

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

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

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

Khorana score for predicting chemotherapy-associated VTE risk.

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

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

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

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

Live Photo to GIF Converter. Runs in your browser — no upload, no watermark.

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

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

Maddrey discriminant function for severity of alcoholic hepatitis.

Clinical Grading Scale for likelihood of malignant hyperthermia.

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.

MASCC risk index for low-risk febrile neutropenia in cancer patients.

Mayo Score for assessing ulcerative colitis disease activity.

Convert drug infusion rate between mcg/kg/min and mL/hour for vasoactive drugs.

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

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

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

Merge multiple PDF files or extract specific pages into a new PDF. Runs entirely in your browser.

Merge Audio Files Online. Runs in your browser — no upload, no watermark.

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

Merge Videos Online. Runs in your browser — no upload, no watermark.

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

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

Modified Centor score for streptococcal pharyngitis probability.

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

Motion Photo MVIMG to GIF. Runs in your browser — no upload, no watermark.

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

Remove audio from MP4, WebM, and MOV videos. Lossless — keeps video quality intact, runs in your browser.

Non-alcoholic fatty liver disease (NAFLD) fibrosis score.

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

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

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

New York Heart Association functional classification of heart failure.

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

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

Calculate cumulative cigarette smoking exposure in pack-years.

Padua score for VTE risk in hospitalized medical patients.

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

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

Palliative Prognostic Index for predicting survival in terminal cancer patients.

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

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

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

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

Psoriasis Area and Severity Index (PASI) for psoriasis severity assessment.

Passport Photo Maker Online. Runs in your browser — no upload, no watermark.

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

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

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

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

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

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

PDF to GIF Converter Online. Runs in your browser — no upload, no watermark.

PDF to JPG Converter Online. Runs in your browser — no upload, no watermark.

PDF to PNG Converter Online. Runs in your browser — no upload, no watermark.

Severity assessment for dehydration in children to guide rehydration therapy.

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

Pediatric-adapted Glasgow Coma Scale for infants and children.

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

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

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

Pulmonary Embolism Rule-out Criteria (PERC) to safely exclude PE.

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

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

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

Photo Collage Maker Online. Runs in your browser — no upload, no watermark.

Ping Pong GIF. Runs in your browser — no upload, no watermark.

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

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

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

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

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

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

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

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

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

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

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

Revised International Staging System for multiple myeloma prognosis.

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

Pediatric coma scale by Raimondi for assessing consciousness in infants and children.

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

Ranson Criteria for mortality in acute pancreatitis (admission and 48h).

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

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

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

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

Remove Audio Noise Online. Runs in your browser — no upload, no watermark.

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

Remove EXIF Metadata from Images. Runs in your browser — no upload, no watermark.

Repair Corrupted GIF Online. Runs in your browser — no upload, no watermark.

Resize GIF Online. Runs in your browser — no upload, no watermark.

Resize videos to 1080p, 720p, 480p, or custom dimensions. Aspect-ratio lock available. Runs in your browser.

Reverse GIF Online. Runs in your browser — no upload, no watermark.

Reverse Video Online. Runs in your browser — no upload, no watermark.

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

Rockall score for mortality risk in upper gastrointestinal bleeding.

Score for screening neonatal sepsis using hematologic criteria.

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

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

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

Rotate GIF Online. Runs in your browser — no upload, no watermark.

Rotate MP4, WebM, and MOV videos by 90, 180, or 270 degrees. Lossless — runs in your browser, no upload.

Add rounded corners or circle crop to images and animated GIFs. Pick radius and background color, then download.

Round Image Corners Online. Runs in your browser — no upload, no watermark.

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

San Francisco Syncope Rule for predicting serious outcomes after syncope.

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

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

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

SCORAD Index for severity of atopic dermatitis.

SIC score for diagnosing sepsis-induced coagulopathy.

Calculate serum osmolality from sodium, glucose, and BUN.

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

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

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

Randomize the frame order of a GIF for glitch or chaotic effects. Full shuffle or partial shuffle every N frames.

Shuffle GIF Frames Online. Runs in your browser — no upload, no watermark.

Simplified PESI (sPESI) for pulmonary embolism 30-day mortality.

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

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

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

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

Sort lines alphabetically, remove duplicates, randomize order, and convert case. All text transforms in one place.

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

Split GIF into Parts Online. Runs in your browser — no upload, no watermark.

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

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

Sprite Sheet Cutter Online. Runs in your browser — no upload, no watermark.

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

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

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

Trauma Associated Severe Hemorrhage (TASH) score for massive transfusion prediction.

Telegram Sticker TGS to GIF. Runs in your browser — no upload, no watermark.

Test regular expressions with live match highlighting.

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

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TIMI Risk Score for non-ST-elevation MI and unstable angina.

TIMI Risk Score for ST-elevation myocardial infarction (STEMI).

Revised Tokuhashi score for prognosis in metastatic spinal disease.

Tomita score for surgical strategy in spinal metastasis.

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

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

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Ulcerative Colitis Endoscopic Index of Severity (UCEIS).

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

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

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Video Screenshot. Runs in your browser — no upload, no watermark.

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

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

WebP Animation Maker Online. Runs in your browser — no upload, no watermark.

Wells criteria for clinical probability of deep vein thrombosis.

Wells criteria for clinical probability of pulmonary embolism.

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

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

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

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

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

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

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

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