Security tools
security
Local
JWT Decoder
Decode JWT headers and payloads, and verify HS256 signatures, without sending your token or key to a server.
security
Local
PEM & X.509 Certificate Inspector
Inspect PEM or DER X.509 certificate identity, validity, names, keys, and fingerprints locally.
security
Local
SSH Public Key Inspector
Decode OpenSSH public keys, fingerprints, comments, and authorized_keys options locally.
security
Local
HMAC Generator & Verifier
Compute and verify HMAC-SHA256, SHA-384, and SHA-512 signatures locally. Your payload and secret never leave the browser.
security
Local
Hash Generator
Generate SHA-256, SHA-384, or SHA-512 hashes locally for text or files, with optional digest verification.
security
Local
Content Security Policy Inspector & Builder
Parse, normalize, and review Content Security Policy directives with a local restrictive baseline.
security
Local
chmod & Unix Permissions Calculator
Translate Unix file permissions between octal, symbolic, and chmod command forms.