JWT Decoder
Decode a JWT header and payload in your browser — no upload, no verify.
How it works
- Paste a JWT (header.payload.signature).
- Click Decode to see the header and payload as formatted JSON.
Frequently asked questions
- Is my token uploaded?
- No. Decoding happens entirely in your browser, which is why it is safe for inspecting tokens.
- Does it verify the signature?
- No — this tool only decodes the header and payload. It does not verify the signature, so never paste secrets you would not want in your own browser tab.