Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to plain text.
JWT Decoder
Decode JSON Web Token headers and payloads.
Input data is processed in your browser
Data is never sent to a server
Tool
What is a JWT (JSON Web Token)?
A JWT is a compact token that holds JSON-formatted claims. It is widely used for authentication and information exchange. A token consists of three Base64URL-encoded sections separated by dots: Header, Payload, and Signature.
How to Use
- Paste the JWT string into the input field.
- The header, payload, and signature are automatically split and decoded.
- You can inspect and copy the formatted JSON payload.
FAQ
Can it verify the signature?
No. This tool only decodes and displays the contents. Signature verification is not supported.
Is it safe to paste tokens here?
Yes. Decoding happens entirely in your browser and nothing is sent to a server.
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