JWT Debugger

JWT Debugger

Decode JSON Web Tokens, read claims with human-readable dates, verify HS / RS / ES signatures and sign new HS256 tokens.

Runs in your browser – nothing to install.

Developer
Bugfish

About this tool

Paste a JSON Web Token to see its header and payload, the claims with readable dates and whether the token has expired or is not valid yet. Verify the signature with a secret (HS*) or a public key as PEM or JWK (RS*, PS*, ES*), or edit header and payload and sign a new HS token. Unsigned tokens (alg "none") are flagged.

Tokens are decoded and verified in your browser and never sent anywhere.

Comments

Log in to write a comment or reply. A moderator checks every comment before it appears – for security and to keep spam and abuse out.

No comments yet.