Decode, edit, and re-sign JSON Web Tokens live. Edit the encoded token on the left or the header , payload , and key on the right — the other side updates instantly. Signs and verifies HMAC ( HS256 ), RSA (RS/PS), ECDSA (ES) and EdDSA, with PEM or JWK keys, entirely in your browser.
HS256/384/512) sign with a shared secret. A short or dictionary-word secret can be cracked offline in seconds — use a long, random secret (32+ bytes) and never commit it to source control.marduc812
2026