What is JSON Formatter?
The JSON Formatter lets you format, minify, and validate JSON data directly in your browser. Paste in messy or minified JSON and get a clean, readable, properly indented version. It also highlights syntax errors so you can spot problems quickly. Useful for developers working with APIs, config files, or any JSON data.
How to Use
Paste your JSON into the input area.
Click Format to get a readable, indented version, or Minify to compress it.
Copy the result or check for validation errors shown below the output.
Why Use This Tool?
If you work with APIs or config files, you deal with JSON constantly. Most online formatters are slow, full of ads, or send your data to their servers. This one processes everything locally in your browser - your data never leaves your device. It is fast, clean, and works offline after loading.
FAQ
No. All formatting and validation happens in your browser. Your data stays on your device.
Yes. The formatter works well with large JSON payloads, limited only by your browser's memory.
Yes. If your JSON is invalid, the tool highlights the error with a clear message so you can fix it.