JWT Decoder

Inspect JWT header and payload locally without validating its signature.

INTERACTIVE WORKSPACE

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How to use JWT Decoder

Inspect JWT header and payload locally without validating its signature. Enter or upload your data in the tool above, run the relevant action and review the result carefully. Use Download or Copy when available.

Important notes

Check generated output before using it in an important workflow.

Frequently asked questions

Is JWT Decoder free?

Yes. You can use this tool without creating an account.

Does it work on mobile?

Most features work in modern mobile browsers. File format support and device resources can vary.

Where is the data processed?

Most functions run locally in your browser. Supported file-processing tools use browser APIs; any exceptions are described near the tool.