JWT Decoder
NewFree online JWT decoder. Paste any JSON Web Token to instantly decode the header and payload. Inspect claims like expiry (exp), issued-at (iat), and issuer (iss). Highlights expired tokens automatically.
JWT Token
Guide
How to Use
- 1
Paste your JWT token into the input field
- 2
Header and payload are decoded automatically
- 3
Check if the token is expired or valid
- 4
Copy individual fields as needed
FAQ
Frequently Asked Questions
Is my token sent to a server?
No. Decoding is done entirely in your browser using JavaScript — your token never leaves your device.
Can it verify the signature?
No. Signature verification requires the secret key. This tool only decodes (base64url decodes) the header and payload.