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Free JWT Decoder Online
Decode and inspect JWT tokens. View header and payload data safely.
Privacy: All processing is done client-side; nothing you type or generate is sent to any server.
Monetization: We show light, non-intrusive ads to keep these tools free for everyone.
How It Works
- Paste JWT token
- View decoded header
- Inspect payload data
- Verify token structure
When to Use This Tool
- ✓Debugging authentication
- ✓Inspecting API tokens
- ✓Learning JWT structure
- ✓Troubleshooting auth issues
Use Cases & Examples
- •API authentication debugging
- •Token inspection
- •OAuth troubleshooting
- •Security analysis
Frequently Asked Questions
Is it safe to decode my JWT?
Decoding happens client-side. However, avoid pasting production tokens with sensitive data.
Does it verify signatures?
This tool decodes only. Signature verification requires the secret key.
What is a JWT?
JSON Web Token - a standard for securely transmitting information between parties as a JSON object.