Developer
JWT Decoder
Inspect JWT header and payload claims in the browser. The token never leaves your device.
Output
Results will appear here.
Why Use It
Small developer tasks, handled locally.
Decode, format, generate, and inspect common developer data without opening a heavy IDE or sending sensitive snippets to a server.
Local
browser utilities
Text
copy-ready output
Private
no server upload
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FAQ
Questions, answered.
Does this verify JWT signatures? +
No. This tool decodes the header and payload only. It does not verify trust or signatures.
Is it safe to paste tokens? +
The decoder runs locally, but you should still avoid pasting production secrets into tools unless necessary.
What parts of the token are shown? +
VizionKit displays the decoded header and payload as formatted JSON.