JWT Decoder
Decode and inspect JWT tokens. View header, payload, expiration.
Free JWT decoder and inspector
Paste any JWT and click Decode to see the header algorithm, payload claims, and signature in formatted JSON. The tool also checks the exp claim and shows whether the token is still valid or has expired.
JWT decoding runs entirely in your browser using the built-in atob function. No token is ever sent to a server, making this safe for development and debugging workflows.
Remember that decoding a JWT does not verify its signature. Always verify tokens server-side using your signing key before trusting the claims.
Frequently Asked Questions
Related tools
All toolsCompress Image
Reduce image file size without losing quality. Supports PNG, JPG, and WEBP.
HEIC to JPG
Convert iPhone HEIC photos to JPG format instantly in your browser.
Resize Image
Resize images to exact dimensions with presets for Instagram, LinkedIn, YouTube, and more.
JPG to PNG
Convert JPG images to PNG format with transparency support.
3 free uses left today
Unlimited with Pro