ToolPronto
Decode a JWT without uploading it
Inspect JWT header and payload locally without pretending to verify the signature.
JWT Decoder
What this tool does: JWT Decoder
Inspect JWT header and payload locally without pretending to verify the signature. Your input and results stay in this browser tab. The operation runs locally, and the page explains the exact scope before you reuse the output. Decoded claims are untrusted. This tool does not verify signatures, keys, identity, or authorization.
Useful for: JWT Decoder
- Use JWT Decoder for a quick one-off result without installing another app.
- Useful for work involving jwt viewer, token decoder, base64url.
- Choose it when browser-only processing matters and this boundary fits the task: Decoded claims are untrusted. This tool does not verify signatures, keys, identity, or authorization.
How to use it
- Enter or paste the content you want to process.
- Choose the relevant mode and run the tool.
- Review the result, then copy it if needed.