Security
Check certificates, headers and other security basics.
Password Strength Checker
Check how strong a password is in your browser: pattern-aware score, estimated crack times and tips. Optional breach check sends only 5 characters of a hash.
Hash Generator
Calculate MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA-3, CRC32 and xxHash of text or a file in your browser. Large files are streamed. Compare against a checksum.
HMAC Generator & Verifier
Compute and verify HMAC-SHA-1, SHA-256, SHA-384 and SHA-512 in your browser with the Web Crypto API. Hex, base64 or base64url output. Your key never leaves the page.
Bcrypt & Argon2 Hash Generator
Hash passwords with bcrypt (cost 4–14) or Argon2id and verify a password against a hash, in your browser. Compatible with PHP password_hash(). Nothing is uploaded.