Category
Security & Crypto
Inspect JWTs and certificates, compute hashes and HMACs, and analyze security headers.
CSR Decoder
Structurally decode a pasted PKCS #10 certificate signing request locally, including subject, SPKI, signature identifier, attributes, and parsable extension requests.
Hash Generator
Compute SHA-1, SHA-256, SHA-384, or SHA-512 hashes for UTF-8 text in your browser.
HMAC Generator
Generate HMAC authentication tags for UTF-8 messages with SHA-256, SHA-384, or SHA-512.
JWT Decoder
Decode the header and claims of a compact JWS JWT locally in your browser.No signature verification is performed.
JWT Time Claims
Inspect numeric exp, nbf, and iat claims against an explicit reference time, entirely in your browser.
PEM Viewer
Inspect complete pasted PEM blocks locally: labels, decoded DER byte counts, and bounded DER structure facts.
Public-Key Fingerprint
Compute a SHA-256, SHA-384, or SHA-512 Web Crypto fingerprint of a pasted public key's DER SubjectPublicKeyInfo.
X.509 Certificate Decoder
Structurally decode a pasted PEM X.509 certificate locally, including names, validity fields, SPKI, and selected extensions.