Encoding / FREE ONLINE TOOL
JWT Decoder & Verifier
Decode JSON Web Tokens online: read the header, payload and expiry, and verify HS256, RS256, ES256 and other signatures with your secret or public key.
Verify the signature
The token and key stay in this browser. Keys are used through the Web Crypto API and are never stored.
QUICK GUIDE
How to use this tool
Paste a token to decode it. Decoding does not prove a token is genuine: enter the secret (HS256, HS384, HS512) or the public key as PEM or JWK (RS, PS, ES, EdDSA) to verify the signature. You can edit the payload and sign a new HS token. The example is signed with the secret your-256-bit-secret.
Your input is processed locally. Use Copy or Download to keep your result.
Keep your workflow moving
Need another step? Try a related tool.