JWT Decoder
Developer ToolsDecode and inspect JSON Web Tokens (JWT). View header, payload, and signature. Verify token expiration and claims.
JWT Decoder — Decode and inspect JSON Web Tokens (JWT). View header, payload, and signature. Verify token expiration and claims. All processing happens instantly in your browser with zero data sent to any server.
Step-by-Step Guide
- 1Enter your data into the input area at the top of the tool.
- 2Configure any options or settings as needed.
- 3Click the primary action button to process your data.
- 4Copy the result using the Copy button, or download if available.
- 5Use Clear/Reset to start over with new data.
Use Cases
- •Quick developer tasks without installing software
- •Processing sensitive data securely in your browser
- •Batch processing when working on multiple projects
- •Learning and experimenting with developer concepts
Pro Tips
- 💡All data stays in your browser — safe for confidential content.
- 💡Bookmark this page for quick access from your browser toolbar.
- 💡Check the Related Tools section below for complementary utilities.
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Frequently Asked Questions
A JSON Web Token (JWT) is a compact, URL-safe token used for authentication. It contains three parts: header, payload, and signature, separated by dots.
Paste your JWT token, and the tool instantly displays the decoded header, payload (with all claims), and signature status.
Yes, completely free with no signup.
All decoding happens client-side. Your token never leaves your browser. However, avoid sharing JWTs in public.
The tool decodes and displays all parts. Signature verification requires the secret key, which we don't store or request for security reasons.
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