Dev Tools
JWT Decoder
Paste a JWT and decode it. Shows exp, iat and all claims. Does not verify signature.
Esc Clear
Header
Payload
Signature
Does not verify Signature — decode only
Paste a JWT Token to decode
What does JWT Decoder?
A tool to decode and inspect JWT tokens — displays the Header, Payload, and validates structure in real time.
How to use JWT Decoder?
- Paste a JWT token into the input field.
- See the decoded Header and Payload.
- Check the expiry and signature details.
Key features
- Decodes JWT Header and Payload
- Displays expiry and issued-at timestamps
- No server — the token never leaves your browser
Frequently asked questions
Does the tool verify the signature?
The tool displays the JWT structure but does not verify signatures — signature verification requires the secret key server-side.
Is it safe to paste a JWT here?
Everything is processed in the browser — the token is not sent to any server. However, avoid sharing production JWTs in public environments.
Is this tool free?
Yes, this tool is completely free and requires no registration.
Is my data saved?
No. All calculations happen in your browser only — no data is sent to any server.