JSON Formatter & Validator
Paste raw JSON to format, beautify, and validate it instantly.
About this JSON formatter
This tool uses the browser's native JSON.parse() and JSON.stringify() to format and validate JSON. It runs entirely client-side — your data never leaves your browser.
Frequently asked questions
What does "minify" do?
Minify removes all whitespace and newlines from the JSON, making it as compact as possible — useful for APIs and config files where file size matters.
Is my JSON data safe?
Yes. All formatting happens in your browser using JavaScript. No data is sent to any server.
Why does it show "Invalid JSON"?
JSON requires double quotes for keys and string values, no trailing commas, and proper nesting. The error message shows the exact parse failure.