SHA hash calculator
SHA hash calculator lets you calculate SHA-256, SHA-384, or SHA-512 for text and files in your browser.
8 tools
Hashes, IDs, and randomness
UUID generator
UUID generator lets you generate and inspect RFC 9562 UUID version 4 or 7 in your browser.
JWT decoder
JWT decoder lets you decode JWT headers, payloads, and time claims without claiming signature verification in your browser.
Password generator
Password generator lets you generate constrained passwords using Web Crypto and rejection sampling in your browser.
HMAC calculator
HMAC calculator lets you calculate HMAC-SHA-256, 384, or 512 without storing the key in your browser.
Random token generator
Random token generator lets you encode Web Crypto random bytes as hexadecimal or Base64url tokens in your browser.
CRC32 checksum
CRC32 checksum lets you calculate CRC-32/ISO-HDLC checksums for text and files in your browser.
Entropy and collision probability
Entropy and collision probability lets you estimate entropy and birthday collision probability for a uniform independent model in your browser.