Cryptography

Generate a Diceware passphrase from the EFF long list with secure browser or manual dice rolls, entropy estimates and policy checks.

Hash one local file in your browser and compare its full digest with SHA-2 or SHA-3 plus required RIPEMD-160 and legacy references.

Generate and verify HMAC values from text or local files with exact byte encodings, SHA choices, header prefixes, and local secret handling.

Identify likely hash formats from pasted values or local text files with confidence labels, cleanup clues and browser-local analysis.

Convert one JWK or a selected JWKS key into SPKI public or PKCS#8 private PEM with local processing and auditable key fingerprints.

Rewrap an existing RSA key for PKCS#1, PKCS#8 or SPKI consumers with optional encrypted output and local public-identity checks.

Generate a unique password in your browser with adjustable character rules, unbiased random selection, and clear strength estimates.

Encrypt or decrypt small text locally with AES-GCM, Argon2id or PBKDF2, portable recovery metadata, and integrity checks for safer handoffs.