JWT Decoder – Free Online Tool
Decode and inspect JSON Web Tokens to view header, payload, and expiration.
algtypsubnameiatSflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c
Example
Input
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ...
Output
Header: {"alg":"HS256","typ":"JWT"}
Payload: {"sub":"1234567890","name":"John Doe","iat":1516239022}The JWT is split into its three parts and each is Base64-decoded for inspection.
How to Use JWT Decoder
- 1
Paste JWT
Paste the JWT token to decode.
- 2
View Parts
See the decoded header, payload, and signature separately.
- 3
Check Expiry
The tool shows if the token has expired.
What is JWT Decoder?
The JWT Decoder splits a JSON Web Token into its three Base64-encoded parts (header, payload, and signature) and displays each in a readable format. It shows algorithm, claims, expiration time, and issued-at timestamps. All decoding is done client-side.
Common Use Cases
- ✦Debugging authentication issues in web applications
- ✦Inspecting token claims and permissions
- ✦Checking token expiration times
Embed This Tool
Add this tool to your website or blog with a simple iframe embed.
<div style="max-width:480px"><iframe src="https://buildutilities.com/embed/jwt-decoder?ref=embed" width="480" height="360" frameborder="0" style="border-radius:8px;border:1px solid #2a2e3a;width:100%"></iframe><p style="font:11px sans-serif;color:#888;margin:4px 0 0;text-align:right">Powered by <a href="https://buildutilities.com/jwt-decoder?ref=embed" target="_blank" rel="noopener">BuildUtilities</a></p></div>
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Share a link to this tool. Results can be passed via URL parameters.
https://buildutilities.com/share/jwt-decoderFrequently Asked Questions
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