No, this tool decodes token parts only and does not perform cryptographic verification.
JWT Decoder
Decode JWT header and payload locally in your browser for quick token inspection.
We do not verify signatures. This tool only decodes the token.
All decoding happens in your browser.
JWT input
Decoded output
Decoded header, payload, and signature will appear here.
About this tool
JWT Decoder helps you decode jwt header and payload locally in your browser for quick token inspection. It runs directly in your browser for speed and privacy with no sign-up required. Use the steps below to get results quickly, then copy or download the output and continue with related tools when needed. Try next: JSON Formatter & Validator • Base64 Encode / Decode.
How to use
- Paste your JWT token into the input panel.
- Click Decode token to parse header and payload sections.
- Review formatted JSON output for both decoded objects.
- Copy header or payload JSON as needed.
- Remember this tool decodes only and does not verify signatures.
Related tools
Try next: JSON Formatter & Validator • Base64 Encode / Decode • URL Encode / Decode.
JSON Formatter & Validator
Validate, prettify, minify, and copy JSON with indent and key-sorting options in one fast tool.
Base64 Encode / Decode
Encode or decode Base64 text safely in your browser with quick copy and example support.
URL Encode / Decode
Encode or decode URL strings and components instantly in your browser.
Frequently asked questions
No, JWT decoding runs entirely in your browser.
A valid JWT must contain exactly three dot-separated sections.
Yes, you can copy decoded header and payload JSON separately.