JWT Decoder Online
Decode and inspect JSON Web Tokens — view header, payload, and expiry. Free, fast, and runs 100% in your browser.
Debugging OAuth flows, inspecting API access tokens, or verifying SSO integrations — all require reading JWT contents. This decoder splits any JWT into its header, payload, and signature sections with clean formatting. Check expiration timestamps, inspect custom claims, and verify token structure — all without sending your sensitive token to any server.
Feature Overview
| Feature | Details |
|---|---|
| Header decoding | ✓ |
| Payload inspection | ✓ |
| Expiry check | ✓ |
| All providers | RFC 7519 |
| Privacy | 100% client-side |
Frequently Asked Questions
Is it safe to paste my production JWT here?
Yes. Decoding happens entirely in your browser. The token never leaves your device.
Does it verify signatures?
The tool decodes and displays signature data but does not validate it, as that requires the secret key.
Can I decode tokens from any provider?
Yes. JWTs follow RFC 7519 — tokens from Auth0, Firebase, AWS Cognito, Okta, and any other provider work.