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JWT Decoder
Decode and inspect JWT tokens instantly. View header, payload, and signature without a secret.
All processing happens in your browser. Your data never leaves your device.
How to Use JWT Decoder
- 1Paste or type your input in the left panel.
- 2Click Process or use the keyboard shortcut ⌘↵.
- 3View the result in the output panel. Use Copy to copy to clipboard or Download to save as a file.
This tool processes data locally in your browser. Nothing is sent to external servers.
Examples
Example input
# Example for JWT Decoder
# Paste your content in the input panel above to get started.Frequently Asked Questions
What is a JWT?
A JSON Web Token (JWT) is a compact, URL-safe token used for authentication and data exchange. It contains three base64-encoded parts: header, payload, and signature.
Do you store my JWT tokens?
No. Decoding happens entirely in your browser. Your token is never sent to any server.
Can I verify the signature?
Use our JWT Signature Verification tool for signature verification with a secret.
Is it safe to paste a JWT here?
Since all processing is client-side, no data leaves your browser. However, avoid sharing sensitive production tokens.
What does the payload contain?
The payload contains claims — key-value pairs about the user or session such as sub, iat, exp, and custom fields.