JWT Decoder
Decode JSON Web Token header and payload.
Decoded entirely in your browser. This only reads the token's contents — it does not verify the signature, since that needs the secret or public key the token was signed with.
Frequently Asked
Is this tool free?
Yes — 100% free, no signup, no watermarks.
Do you store my files?
All processing happens in your browser — nothing is uploaded to our servers.
Can I use it on mobile?
Yes, on any modern phone, tablet or desktop browser.