Security tools

Security tools that run locally in your browser.

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Password Strength Checker
Check password strength with entropy scoring and crack-time estimates. See what makes a password weak or strong.
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HMAC Generator — SHA-256 & SHA-512
Generate HMAC signatures with SHA-256, SHA-384, or SHA-512. Enter message and secret key — runs in your browser.
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Hash Identifier — Detect Hash Type
Identify hash types from pasted digests. Detect MD5, SHA-256, bcrypt, and more. Paste only, runs in browser.
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IBAN Validator Online
Validate IBAN numbers with mod-97 check digits. Paste an IBAN to verify format and checksum. Free browser tool.
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Luhn Checker — Credit Card Validation
Validate numbers with the Luhn algorithm. Check credit card and identifier check digits. Paste only, in browser.
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JWT Security Checker — Audit Tokens
Audit pasted JWT tokens for security issues. Flag alg none, expiry, and missing claims. Runs in your browser.
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Compare Two Hashes Online
Compare Two Hashes Online. Free, instant, runs in your browser.
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Checksum Calculator — SHA-256 & More
Checksum Calculator — SHA-256 & More. Free, instant, runs in your browser.
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SSL Certificate Decoder — Paste PEM
SSL Certificate Decoder — Paste PEM. Free, instant, runs in your browser.
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CSR Generator — RSA Key Pair
CSR Generator — RSA Key Pair. Free, instant, runs in your browser.
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PEM Decoder — Parse PEM Blocks
PEM Decoder — Parse PEM Blocks. Free, instant, runs in your browser.
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Certificate Expiration Checker
Certificate Expiration Checker. Free, instant, runs in your browser.
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