JWT Decoder: View Header and Payload
Decode a JSON Web Token to view its header, payload, and expiry status in your browser. Decoding does not verify the signature.
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Privacy Notice: All files and input data are processed 100% locally inside your browser. No files are uploaded to our servers.
How to Use:
- Paste a JSON Web Token (header.payload.signature) into the input box.
- Click Decode to view the decoded Header and Payload as formatted JSON.
- Check the expiry status shown above the decoded output.
Key Features:
- Decodes both the Header and Payload segments as readable JSON
- Shows whether the token is expired or still valid based on its exp claim
- Clearly states that decoding does not verify the signature
- Runs entirely client-side; your token is never sent anywhere