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🧠 Developer Tools
JWT Decoder Online — Decode JSON Web Tokens
Decode JWT header and payload without verifying signatures. Useful for debugging authentication flows.
How to use
- Paste JWT token.
- View decoded header and payload.
Frequently Asked Questions
Does this verify signatures?▼
No. This tool only decodes; it does not verify token authenticity.
Is it safe?▼
Yes, processing is local. Avoid pasting production secrets on shared machines.
What JWT formats work?▼
Standard three-part JWTs (header.payload.signature).