Use JWT Decoder
Decode token header and payload without uploading the token.
Token decoded. Signature is shown but not verified.
Quick answer
JWT Decoder is a free online tool that helps you decode JWT headers and payloads safely. It runs in your browser, so you can work with development data, text, files, or generated output without creating an account.
About JWT Decoder
JWT Decoder helps you decode JWT headers and payloads safely. It is designed for focused local-first workflows where you need a quick result without creating an account or sending your input to a server.
Common uses include debugging authentication tokens in development, inspecting jwt claims from api responses, verifying token structure before validation.
Use the examples, usage notes, FAQ, and related tools below when you need to compare formats, build sample data, validate inputs, or move into the next step of the same workflow.
What this tool does
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
Related workflow
After using JWT Decoder, many workflows continue with related tools for validation, conversion, cleanup, mock data, or final export.
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.