JWT Decoder

Decode and inspect JSON Web Tokens (JWT)

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About JWT Decoder

Paste any JWT token to instantly see its decoded header, payload, and signature. Automatically detects token expiration and displays human-readable timestamps for iat, exp, and nbf claims.

Why use our tool?

  • 100% Free & Unlimited: Use this tool as many times as you want, no limits, no sign-up required.
  • Fully Private: All processing is done locally in your browser. Your data never leaves your device.
  • Lightning Fast: Results are delivered instantly — no server round-trips or waiting.
  • No Account Needed: Just open and use. No registration, no tracking.

How to use

  1. Enter your data or upload a file into the tool above.
  2. Adjust any settings to your preference.
  3. Get instant results processed right in your browser.
  4. Copy or download the output — it's yours!
Free & Unlimited — No quota, no account required

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Frequently Asked Questions

QCan this tool verify JWT signatures?

A

No, signature verification requires the secret key or public key, which should never be shared with a client-side tool. This tool only decodes and inspects the token contents.

QIs my token safe?

A

Yes, the JWT is decoded entirely in your browser using JavaScript. It is never transmitted to any server.