>_ JSON Formatter

Format, beautify and validate your JSON data instantly. Paste raw JSON below and get perfectly indented, readable output. 100% client-side — your data never leaves your browser.

How to Use JSON Formatter

  1. Paste your JSON data into the input area above
  2. Click "Format JSON" to beautify with proper indentation
  3. Click "Minify" to compress JSON to a single line
  4. Click "Validate" to check if your JSON is valid
  5. Click "Copy Output" to copy the result to clipboard

Example

Input:

{"name":"John","age":30,"city":"Istanbul","skills":["HTML","CSS","JS"]}

Formatted Output:

{
  "name": "John",
  "age": 30,
  "city": "Istanbul",
  "skills": [
    "HTML",
    "CSS",
    "JS"
  ]
}

Frequently Asked Questions

What is JSON Formatter? >
JSON Formatter is a free online tool that takes raw, unformatted JSON data and outputs it with proper indentation, making it easy to read and debug. It also validates your JSON syntax.
Is my data safe? >
Absolutely. All processing happens entirely in your browser using JavaScript. Your data is never sent to any server. This tool works completely offline once the page is loaded.
What indent size does it use? >
By default it uses 2-space indentation for compact, readable output. The minify option removes all whitespace for the smallest possible size.
Can I format large JSON files? >
Yes. Since everything runs in your browser, the limit depends on your device's memory. The tool can handle JSON files up to several megabytes without issues.
Is this tool really free? >
Yes, 100% free with no signup, no limits, and no hidden costs. Use it as many times as you want.