About JWT Decoder
Decode and inspect the header, payload, and signature sections of any JSON Web Token (JWT) without needing the secret key. View all claims, expiration times, and token metadata in a human-readable format. Useful for debugging authentication flows and verifying token contents.
How to Use JWT Decoder
- 1
Paste your JWT
Enter the full JWT string, including all three dot-separated sections.
- 2
Decode
Click Decode to split and decode the header and payload sections.
- 3
Inspect claims
Review the decoded claims, including subject, issuer, expiration, and any custom fields.
Common Use Cases
- Debugging authentication tokens during development
- Inspecting token expiration and claim contents
- Verifying the structure of tokens issued by an auth provider
- Understanding JWT payloads in third-party API integrations
Frequently Asked Questions
Is it safe to paste my JWT here?
Can this tool verify a JWT signature?
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