Free JWT Decoder Online — Decode and inspect JWT tokens without verification
How to Decode JWT Tokens
Paste any JWT token into the input field and click Decode. The tool splits the token into its three parts (header, payload, signature) and displays the decoded JSON content.
Useful for debugging authentication issues, inspecting token claims, checking expiration dates, and understanding JWT structure during API development.
Can I decode a JWT without the secret?
Yes. JWT payloads are Base64-encoded, not encrypted. Anyone can read the contents. The signature only verifies integrity — it doesn't hide the data.
What claims does this tool show?
It displays all standard claims (exp, iat, iss, sub, aud) and any custom claims in your token. Expiration status is highlighted in green (valid) or red (expired).
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