JSON Formatter
Format, validate, and inspect JSON in your browser.
Format CSS rules, selectors, and declarations.
Your result will appear here.
Enter your input, then run the tool.Input: .card{display:flex;gap:16px;padding:20px}Use the labeled units and valid input. 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.