What is a JSON Web Token (JWT)?

A JWT (JSON Web Token) is an open standard (RFC 7519) that defines a compact, self-contained way for securely transmitting information between parties as a JSON object.

What are the three parts of a JWT?

A JWT consists of three parts separated by dots (.): Header (algorithm & token type), Payload (claims & user data), and Signature (verifies integrity).

Is it safe to paste my production JWT here?

Yes. This tool decodes JWTs entirely in your browser using client-side JavaScript. No tokens or payloads are sent across the network.

JWT Decoder — Free Online JSON Web Token Debugger & Parser

How to Use the JWT Decoder

Paste JWT String

Paste your encoded token (e.g. eyJhbGciOi...) into the input area.

Review Header & Payload

The decoded header algorithm and payload claims are formatted as clean JSON.

Check Token Expiration

Inspect standard claims such as exp, iat, and sub with human-readable timestamps.

Why Choose Our JWT Decoder?

Color-coded JWT token structure visualizer

Human-readable timestamp conversion for exp and iat claims

Zero network transmission for security tokens

One-click JSON copy

Pro Tips for Best Results

Bookmark this page (Ctrl+D / Cmd+D) for fast offline-capable access whenever you need it.
Use keyboard shortcuts (Tab / Enter / Space) for quick form navigation without touching your mouse.

Frequently Asked Questions

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