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Generate strong random passwords in your browser, with the length, character types and entropy you choose — and nothing sent to a server.
Generate memorable passphrases from random words — the diceware approach, with the real entropy shown for the number of words you pick.
Generate a bcrypt hash at any cost factor and verify a password against an existing one, using PHP's own password_hash and password_verify.
Decode a JWT in your browser to read its header, payload and claims — with expiry dates worked out and dangerous headers flagged.
Generate an MD5 hash of text or a file in your browser, with the digest updating as you type and nothing uploaded.
Generate an HMAC signature with MD5, SHA-1, SHA-256, SHA-384 or SHA-512 and a secret key — the way webhook signatures are verified.
Encode text or a file to Base64 in your browser, with URL-safe output, MIME line wrapping and ready-to-paste data URIs.
Decode Base64 back to text or a file in your browser — accepts URL-safe input, missing padding and data URI prefixes.
Test how strong a password really is: entropy in bits, the weak patterns found inside it, and how long each named attack would take.
Generate a SHA-256 hash of text or a file in your browser — the current standard for checksums, signatures and integrity checks.
Decode an SSL certificate and read everything inside it — subject, issuer, validity, every SAN, key details, extensions and fingerprints.
Generate a SHA-512 hash of text or a file in your browser — the 512-bit member of the SHA-2 family, often faster than SHA-256 on 64-bit CPUs.
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