JWT Decoder Online Free
Decode JSON Web Token (JWT) header parameters and payload data locally. Inspecting JWT token roles, scopes, or expiration dates manually is slow.
Your inputs are processed locally in your browser. Nothing is uploaded to any server.
Why You Need a JWT Decoder
Inspecting JWT token roles, scopes, or expiration dates manually is slow.
How JWT Decoder Works
The engine decodes JWT base64url sections and formats them into JSON headers and payloads for high-speed operation, providing instant feedback without sending any data over the internet.
When to Use This Tool
Use the JWT Decoder when you need to decode JSON Web Tokens (JWT) payload data during debugging auth tokens, checking user roles, and audits token expirations.
Step-by-Step Usage
- Paste your encoded JWT token string.: Paste your encoded JWT token string.
- Review parsed header details, payload data, and signature info.: Review parsed header details, payload data, and signature info.
- Check expiration (exp) indicators.: Check expiration (exp) indicators.
Advantages
- Decodes: Decodes token headers and payloads into color-coded JSON
- Calculates: Calculates token expiration times in local timezone
- Runs: Runs 100% client-side to protect sensitive token keys
Privacy and Safe Usage
Avoid pasting secrets, API keys, private tokens, or credentials into formatting, decoding, or testing tools unless you fully understand how the page processes the data.
Related Tools
Here are some other related utility tools you can explore to streamline your workflows:
FAQs
Is my token sent to a server?
No. The decoding is performed client-side in your browser; your tokens are never uploaded.