Free Tool
JWT Decoder
Decode and inspect JSON Web Token headers and payloads instantly. See algorithm, claims, expiration status, and timestamps. All processing happens in your browser.
Algorithm:
Type:
Issued At (iat)
Expires At (exp)
Not Before (nbf)
Header
Payload
Signature
Signature verification requires the secret key and is not performed client-side.
How it works
1. Paste
Paste your JWT token. It will be decoded instantly. Header, payload, and signature are separated.
2. Inspect
View the decoded header and payload as formatted JSON. See algorithm, expiration, and all claims.
3. Verify
Check expiration status at a glance. Your token never leaves your browser. Fully client-side.
Need more developer tools?
We're building more free utilities for web artisans. Get in touch with suggestions.
Contact Us