JSON Formatter
Format, validate, and minify JSON data. Paste your JSON and get clean, readable output.
What is JSON formatting?
JSON (JavaScript Object Notation) is the most widely used data interchange format on the web. APIs, configuration files, and databases all rely on JSON to transmit structured data. Properly formatted JSON uses consistent indentation and line breaks so you can quickly scan nested objects and arrays, spot missing commas or brackets, and understand the shape of an API response at a glance.
When to use this tool
Use the JSON Formatter whenever you receive minified API responses, need to validate a JSON payload before sending it to an endpoint, or want to compress JSON for production use. It handles common issues like trailing commas, single quotes instead of double quotes, and duplicate keys. It works entirely in your browser — no data is sent to any server.
How developers use JSON daily
Frontend developers work with JSON in fetch responses, localStorage, and configuration files like package.json and tsconfig.json. Backend developers parse JSON request bodies, serialize database records, and define API schemas. Having a quick, reliable formatter saves time when debugging network requests in DevTools or preparing test fixtures for unit tests.
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