Crypto
Hashing, HMAC, file checksums, password checks, UUIDs/ULIDs, RSA/EC keys, X.509 inspection, TOTP, and random strings — all in your browser.
9 toolsHash Generator
MD5 and SHA family digests for any UTF-8 text — private and instant
HMAC Generator
Keyed HMAC-SHA signatures for messages and test vectors
File Hash Calculator
MD5, SHA-256, and CRC32 of any local file — never uploaded
Password Strength Meter
Entropy, zxcvbn, and breach checks without sending your password
Random String Generator
Generate cryptographically secure random strings with charset presets, custom alphabets, separators, and Web Worker offload
UUID / ULID Generator
UUID v4, UUID v7, and ULID batches with ULID time decode
RSA / EC Key Pair Generator
RSA-PSS and ECDSA PEM keys via Web Crypto — private to your session
Certificate Decoder
Parse PEM X.509 certificates: subject, SANs, validity, fingerprint
TOTP Generator
RFC 6238 codes from Base32 secrets — matches authenticator apps