JWT signature verifier
Verify compact JWT signatures with a local secret, JWK, or PEM public key.
More Security & privacy tools
Generate passwords, check tokens, and encrypt files.
- Password GeneratorCreate a cryptographically random password from selected character sets.
- Passphrase GeneratorCreate a memorable random passphrase with measurable entropy.
- Random BytesGenerate cryptographically strong bytes as HEX or Base64.
- UUID v4 GeneratorGenerate a standards-shaped UUID from browser randomness.
- SHA-256 Text ChecksumCalculate a SHA-256 checksum for UTF-8 text.
- SHA-384 Text ChecksumCalculate a SHA-384 checksum for UTF-8 text.
- SHA-512 Text ChecksumCalculate a SHA-512 checksum for UTF-8 text.
- SHA-256 File ChecksumCalculate a SHA-256 checksum for a local file.