JSON Formatter

JSON (JavaScript Object Notation) is the most widely used data interchange format on the web. APIs return it, configuration files use it, and databases store it. But raw JSON — especially when minified or deeply nested — is nearly impossible to read. A JSON formatter adds consistent indentation and line breaks so you can quickly scan the structure, find specific keys, and understand the data hierarchy at a glance.

Developers reach for a JSON formatter dozens of times a day. Common scenarios include inspecting API responses while debugging, cleaning up JSON before pasting it into documentation, minifying a configuration payload before sending it in a request body, and validating that a hand-edited JSON file is still syntactically correct. The minify function is equally useful: it strips all unnecessary whitespace to produce the smallest possible string, which reduces payload sizes in production code and API calls.

This tool also serves as a JSON validator. When you paste invalid JSON, it does not silently fail — it reports the exact parse error with position information so you can pinpoint the problem. Common issues include trailing commas, single quotes instead of double quotes, and unescaped special characters. All processing happens in your browser using the built-in JSON.parse and JSON.stringify functions, so your data is never transmitted to any server.