Runs fully in your browser. Inputs stay on your device. See recent fixes on changelog.
JWT Decoder
Paste a JSON Web Token to decode its header, payload, and signature. Everything runs locally in your browser.
Cmd/Ctrl+Shift+L Load sampleCmd/Ctrl+Shift+X Clear
Paste a JWT token above to decode it
About JWT Decoder
Decode JWT tokens to inspect header, payload, and signature. Shows expiration status. Decode and inspect JWT tokens online for free. View header, payload, signature, and expiration status. Everything runs client-side in your browser for maximum speed and privacy — no data is sent to any server, and no signup is required.
Related tools: Base64 Encode / Decode, JSON Formatter & Validator, Hash Generator
How to Use JWT Decoder
- Enter your input into the tool.
- The tool processes it instantly in your browser.
- Copy the result to your clipboard.
Frequently Asked Questions
What is JWT Decoder?
Decode and inspect JWT tokens online for free. View header, payload, signature, and expiration status.
Is JWT Decoder free to use?
Yes, it is completely free to use. It runs entirely in your browser with no signup, no account, and no usage limits.
Is my data safe when using JWT Decoder?
Yes. All processing happens locally in your browser. No data is uploaded to any server, so your information stays private and secure.