JWT Decoder
Last updated: 2026 · Free online tool
What is JWT Decoder?
Free online tool to decode JWT tokens and inspect the Header, Payload, and Signature, reading claims, algorithm, and expiration (exp) safely in your browser.
How to Use
- 1 Enter JWT Token — Paste the JWT token into the input field. The Bearer prefix is automatically removed.
- 2 View Decoded Result — Header and Payload are automatically decoded and displayed as JSON.
- 3 Check Expiration — If an exp claim exists, the remaining time is displayed in real-time.
- 4 Copy Sections — Use each section's copy button to copy Header or Payload JSON.
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Frequently Asked Questions
A JWT Decoder parses a JSON Web Token and displays the Header (algorithm), Payload (claims), and Signature separately.
No. This tool only decodes. Signature verification must be done on the server with the secret key.
Yes. Tokens can be decoded regardless of expiration, and the expired status is shown in red.
No. Tokens starting with 'Bearer ' are automatically stripped.
No. All decoding is done in the browser. Sensitive tokens can be checked safely.