JSON Formatter
Format, validate, and inspect JSON in your browser.
Check whether provided origin, methods, headers, and credentials align.
Request origin: https://app.example.com Access-Control-Allow-Origin: https://app.example.com Request method: GET Access-Control-Allow-Methods: GET, POST Requested non-safelisted headers (comma separated): Content-Type Access-Control-Allow-Headers: Content-Type Credentials mode: Omit Access-Control-Allow-Credentials: false
Use the labeled units and valid request origin. The Example button supplies a reproducible starting input.
Format, validate, and inspect JSON in your browser.
Inspect token headers and payloads without uploading them.
Create cryptographically random version 4 identifiers.
Your result will appear here.
Enter your input, then run the tool.