JWT Decoder
Developer ToolsToolio JWT Decoder splits a token into header and payload and pretty-prints the claims in your browser. Use it to debug expiry, audience, and custom fields while the signature stays on this device. Decoding is inspection only—nothing is sent to Toolio.
155k uses · Runs locally
How to use
- 1Paste a JWT into the decoder field.
- 2Inspect the header algorithm and type.
- 3Review payload claims such as exp, sub, and roles.
- 4Copy a claim or leave the token unshared.
Benefits
- See claims without a backend debugger.
- Tokens never travel to a remote decoder.
- Spot expired or mis-scoped tokens quickly.
Frequently asked questions
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