JWT Decoder
Decode and inspect JSON Web Tokens.
100% In-Browser • Zero Uploads
No Login Required
About JWT Decoder
Easily decode JWTs to view their header and payload information without sending the token to any server.
100% Client-Side
Your files and data are processed locally in your browser memory. Never uploaded to remote servers.
Zero Login Required
Instant access with no account, no email sign-up, no passwords, and no subscription paywalls.
Instant Speed
Powered by modern WebAssembly and native web APIs for near-instant rendering and zero latency.
Privacy Guaranteed
Zero data retention, no user tracking cookies, and GDPR/HIPAA friendly. Your data remains strictly yours.
All Devices Ready
Fully responsive on desktop, tablet, and mobile devices without installing software or extensions.
How to Use
- Paste your JWT string into the input box.
- View the decoded Header and Payload instantly.
- If needed, input a secret to verify the signature.
- Analyze the token data.