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Premium JWT Decoder

Decode JSON Web Tokens in real-time with our secure, browser-based tool. No data leaves your computer.

Enter JWT Token

Decoded Results

No token analyzed

HEADER: ALGORITHM & TOKEN TYPE

No header data

PAYLOAD: CLAIMS

No payload data

TOKEN INFORMATION

Issued At: -
Expiration: -
Signature: Not verified (client-side only)

About JWT Decoder

Our free JWT Decoder tool allows you to instantly decode JSON Web Tokens in your browser without sending any data to a server. This ensures maximum privacy and security for your sensitive tokens.

What is a JWT?

JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed.

Common Uses for JWTs

  • Authentication: The most common scenario. After the user logs in, each subsequent request will include the JWT
  • Information Exchange: Securely transmitting information between parties
  • Authorization: Once logged in, JWTs determine what resources a user can access
  • Session Management: Stateless sessions for scalable applications

Benefits of Our Tool

100% Secure

All processing happens in your browser - no server interaction

Real-time

Instantly decode tokens as you type or paste

Detailed Analysis

Examine headers, payloads, and token metadata

Free Forever

No signup required, no hidden costs

Frequently Asked Questions

Is this tool secure for sensitive tokens?

Yes! This tool works entirely in your browser. Your JWT tokens never leave your computer or are transmitted over the network.

Does this tool verify JWT signatures?

No, signature verification requires the secret key and is a server-side operation. This tool focuses on decoding the token structure and claims.

What is the structure of a JWT?

A JWT consists of three parts: Header (algorithm and token type), Payload (claims), and Signature. These parts are separated by dots (.).

Can I decode expired tokens?

Yes, our decoder can process any properly formatted JWT regardless of expiration status. The expiration claim (exp) is displayed but doesn't prevent decoding.