JWT Decoder - Decode JSON Web Tokens Online
Decode and inspect JSON Web Tokens instantly
What is JWT Decoder?
JWT Decoder is a developer tool that allows you to decode and inspect the contents of JSON Web Tokens (JWT). It splits the token into its three parts: Header, Payload, and Signature, and displays the decoded JSON data in a readable format. This is essential for debugging authentication issues and verifying token contents.
How to Use JWT Decoder
Paste your JWT string into the input field
The tool automatically decodes the token
View the decoded Header and Payload sections
Check standard claims like expiration (exp) and issued at (iat)
Key Features
Frequently Asked Questions
What is a JWT?
JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.
Is it safe to paste my production tokens here?
Yes, this tool runs entirely in your browser. Your tokens are never sent to any server. However, as a best practice, always be cautious with production credentials.
Does this tool verify the signature?
No, this tool only decodes the token to show its contents. It does not verify the signature, as that requires the secret key.