JWT Decoder Online — Decode JSON Web Tokens
Decode a JSON Web Token online. Paste a JWT and instantly see its decoded header and payload as readable JSON — free, private, and processed entirely in your browser.
How to use JWT Decoder
- Paste your JSON into the editor, or upload / drag-and-drop a
.jsonfile. - Use the toolbar to Format, Minify, or Fix your JSON.
- Switch to Tree, Graph, or Table to explore the structure.
- Filter values with a JSONPath query when you need a specific part.
- Click Copy or Download to save the result.
Features
Beautify & minify
One-click pretty-print or compact your JSON to a single line.
Validate & auto-fix
Catch syntax errors instantly and repair common mistakes automatically.
Tree, graph & table views
Explore nested JSON visually and edit it inline.
Transform tools
Stringify, unescape, parse nested JSON, and sort keys.
JSONPath filter
Query and extract exactly the values you need.
100% private
Everything runs in your browser — nothing is uploaded.
What is JWT Decoder?
A JWT (JSON Web Token) has three Base64URL-encoded parts — header, payload, and signature — separated by dots. This decoder reads the header and payload and shows them as formatted JSON so you can inspect claims like the subject, issuer, and expiry. Decoding happens locally in your browser; your token is never sent anywhere. Note that this tool decodes but does not verify the signature.
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Frequently Asked Questions
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