Tool facts
- Upload required
- No
- Signup required
- No
- Category
- Developer Tools
Use JWT Decoder
Decode token header and payload without uploading the token.
Token decoded. Signature is shown but not verified.
What this tool does
Decode JWT header and payload sections
Display formatted JSON for each section
Show token expiration and issued-at times
Highlight expired tokens automatically
How to use JWT Decoder
- 1
Paste your JWT token into the input field.
- 2
View the decoded header and payload as formatted JSON.
- 3
Check the expiration and issued-at timestamps.
- 4
Copy any section for debugging or inspection.
Examples
JWT token
eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY3ODkwIn0.dozjgNryP4J3jVmNHl0w5N_XgL0n3I9PlFUP0THsR8U
Payload
{"sub":"1234567890"}
Use cases
- Debugging authentication tokens in development
- Inspecting JWT claims from API responses
- Verifying token structure before validation
- Learning how JWT tokens work
Privacy and usage notes
CodeVella tools are designed to run locally in your browser. Your input is not uploaded to a server, and no account is required.
Generated test data is intended for development, QA, demos, and safe internal workflows.
Frequently asked questions
Is my data uploaded?+
No. This tool is designed to run locally in your browser.
Do I need an account?+
No signup is required for CodeVella tools.