JWT.io
JWT.io provides tools for decoding, verifying, and debugging JSON Web Tokens online. · JWT.io · Security
Overview
JWT.io is a free online tool for decoding, verifying, and debugging JSON Web Tokens, ideal for development and learning but not for production use.
Good fit
Use JWT.io when you need to quickly decode or debug JWTs during development or troubleshooting.
- debugging JWTs
- learning JWT structure
- manual verification
Not a fit
Avoid using JWT.io for automated or production token validation, or when handling sensitive tokens.
- automating JWT validation
- handling confidential tokens
- production environments
Quickstart · 5 steps
- Visit https://jwt.io/ in your browser.
- Paste your JWT token into the encoded field.
- Review the decoded header, payload, and signature sections.
- Optionally, enter a secret or public key to verify the signature.
- Use the debugger to inspect claims and troubleshoot issues.
Other free security options
Free tierWhat you get freeRiskCard
Let's Encrypt · Security
50 certificates per registered domain per week · 5 duplicate certificates (same identifiers) per week · 90-day certificate validity
Billing risk: None
No card
GitGuardian · Security
Up to 25 developers · Unlimited real-time secret scanning · Up to 500 historical scan detections
Billing risk: None
No card
Snyk · Security
5 projects · Snyk Code (SAST): 100 tests/month · Snyk Open Source (SCA): 200 tests
Billing risk: None
No card
Cloudflare · Security
Up to 20 widgets per account · Works without other Cloudflare services
Billing risk: None
No card