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- Free JWT Decoder — Decode JSON Web Tokens Online
✓100% Free✓No Signup✓No Data Stored✓Works Instantly
✦ Free Online Tool
FREE JWT DECODER
Decode and inspect JSON Web Tokens instantly. View header, payload and expiry. Free JWT decoder, no signup.
Invalid JWT. Must have 3 parts separated by dots.
JWT Structure
Header.Payload.Signature — three Base64URL encoded parts.
- Header — algorithm type
- Payload — data claims, expiry, user info
- Signature — verifies token integrity
Frequently Asked Questions
Is it safe to paste my JWT?+
This decodes in your browser only. Never paste real production tokens in any online tool.
Does it verify the signature?+
No. Signature verification needs the secret key. This tool decodes only.
What is exp in payload?+
Unix timestamp of token expiry. Tool shows if token is expired.
Is it free?+
Yes, 100% free.