JWT Decoder
Decode a JWT's header and payload.
Embed this tool on your site
Free — a link back to LoopStook is included.
What is the JWT Decoder?
Decode a JSON Web Token (JWT) online for free. Inspect the header and payload — no signature verification, no server round-trip.
How to use the JWT Decoder
- 1
Add your text
Paste or type your content into the JWT Decoder.
- 2
Set any options
Adjust the available options to fit exactly what you need.
- 3
Copy or download the result
The output is generated instantly in your browser — copy it or download it. Nothing is uploaded to a server.
Frequently asked questions
Does this verify the JWT signature?
No — this only decodes the header and payload for inspection. It never checks the signature, and it never leaves your browser.
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