JWT inspector
Read a JWT header and payload locally. Claims and signatures remain unverified.
Tool guide
How to use JWT inspector
Read a JWT header and payload locally. Claims and signatures remain unverified.
- Choose your input type and options. Try the clearly labelled sample first.
- Three-part compact tokens up to 64 KiB; 64 JSON container levels and 20,000 values.
- UNVERIFIED: this only reads text. No signature, issuer, audience or trust is checked. Do not treat decoded claims as proof of identity. Encrypted tokens are unsupported; no key is fetched.
- Choose the action to process locally, review the text result, then copy or download it. Editing or clearing the input discards the old result. Cancel stops the worker; leaving the page clears working data. No input or result is uploaded or stored by this tool.