JWT Decoder
Decode JWT header and payload locally.
JWT Decoder Online
Decode the header and payload of a JSON Web Token directly in your browser. Vamriko's JWT Decoder is designed for developers who need to inspect JWT contents while troubleshooting authentication flows, API requests, and application data.
Decoding a JWT does not verify its signature or prove that the token is authentic. Use the decoded information for inspection and debugging, and keep sensitive tokens protected.
How to Use the JWT Decoder
1. Enter your JWT
Paste the JSON Web Token into the decoder input.
2. Decode the token
Let the tool decode the readable JWT header and payload data in your browser.
3. Inspect the result
Review the decoded token fields when debugging an application or API workflow.
JWT Decoder FAQ
What is a JWT?
JSON Web Token, or JWT, is a compact token format commonly used to carry claims between systems. A typical JWT contains a header, payload, and signature separated by dots.
Does decoding a JWT verify its signature?
No. Decoding exposes the encoded header and payload, but signature verification requires the appropriate cryptographic verification process and key.
Can I use this tool to inspect API tokens?
Yes, the decoder can help inspect the readable parts of a JWT during development or troubleshooting. Avoid exposing real production credentials or sensitive tokens unnecessarily.
Is the JWT payload encrypted?
Normally, the JWT payload is encoded rather than encrypted. Anyone who obtains the token may be able to decode its readable contents.
Do I need an account to decode a JWT?
No account is required to use the JWT Decoder.