JWT Decoder
Decode JSON Web Tokens to inspect header, payload, and expiration.
Free Web vs Desktop App
Web (Free)
- +JWT Decoder with basic functionality
- +No signup or account required
- +Works in any modern browser
- -Full functionality on the web
- -Single tool per page, no integrations
Desktop App ($29 one-time)
- Integrated with HTTP Client auth headers and response inspection
- All 16 developer utilities in one ToolBox
- Plus terminal, HTTP client, database client, Docker manager
- AI agents, code editor, Git client, and 100+ more features
- macOS, Windows, Linux — one-time purchase, own forever
About JWT Decoder
Paste a JWT and instantly see the decoded header and payload as formatted JSON. Checks expiration status, issued-at time, and displays all standard claims. Essential for debugging authentication flows, OAuth tokens, and API authorization.
Frequently Asked Questions
Is JWT Decoder free to use?
Yes! This online version is completely free with no signup required. Full functionality on the web. For unlimited usage and full integration with 100+ developer tools, download the 1DevTool desktop app ($29 one-time).
Is my data safe?
Absolutely. All processing happens entirely in your browser. Your data never leaves your machine — nothing is sent to any server. The tool runs 100% client-side using JavaScript.
What do I get with the desktop app?
The desktop app includes JWT Decoder with no limits, plus 15 other developer utilities. Beyond the ToolBox, you get multi-agent AI terminals, HTTP client, database client (26 engines), Docker manager, Git client, code editor, browser preview, and more — all in one workspace. $29 one-time, no subscription.
Like this tool? There's a lot more.
Download 1DevTool to get JWT Decoder with no limits, plus 15 other utilities, AI terminals, HTTP client, database client, and 100+ features.