JSON Formatter Online

Format JSON data with our free online tool. Clean up messy JSON and make it readable.

Input JSON

Formatted JSON

Formatted JSON will appear here

How to Use JSON Formatter

1. Enter Your JSON

Start by entering or pasting your JSON data into the input box. You can also load JSON directly from a URL.

{
  "menu": {
    "id": "file",
    "value": "File",
    "popup": {
      "menuitem": [
        {"value": "New", "onclick": "CreateNewDoc()"},
        {"value": "Open", "onclick": "OpenDoc()"},
        {"value": "Close", "onclick": "CloseDoc()"}
      ]
    }
  }}
Before Formatting:
{"menu":{"id":"file","value":"File","popup":{"menuitem":[{"value":"New","onclick":"CreateNewDoc()"},{"value":"Open","onclick":"OpenDoc()"},{"value":"Close","onclick":"CloseDoc()"}]}}}
After Formatting:
{
  "menu": {
    "id": "file",
    "value": "File",
    "popup": {
      "menuitem": [
        {"value": "New", "onclick": "CreateNewDoc()"},
        {"value": "Open", "onclick": "OpenDoc()"},
        {"value": "Close", "onclick": "CloseDoc()"}
      ]
    }
  }}

2. Format and Validate

Click the Format button to automatically format and validate your JSON. The tool will detect any syntax errors and apply proper indentation.

3. Use the Results

View your formatted JSON with syntax highlighting. Use the collapse/expand buttons to navigate large JSON structures. Copy or download the formatted result with one click.

Formatted JSON
-{
"menu": {
"id": "file",
+"popup": {
}

Frequently Asked Questions

What is JSON Formatter Online?

JSON Formatter Online is a powerful tool that helps you format, validate, and beautify JSON data. It provides syntax highlighting, error detection, and collapsible JSON structures to make your JSON data more readable and manageable.

How to use JSON Formatter Online?

Using JSON Formatter Online is simple: 1) Paste your JSON or load it from a URL 2) Click the Format button 3) View the formatted result with syntax highlighting and collapsible sections. You can copy or download the formatted JSON with one click.

What features does JSON Formatter Online offer?

Our JSON Formatter includes: real-time syntax highlighting, error detection with detailed messages, collapsible JSON structures for easy navigation, copy to clipboard functionality, download formatted JSON, and the ability to load JSON directly from URLs.

How do I know if my JSON is valid?

JSON Formatter Online automatically validates your JSON when formatting. If there are any syntax errors, it will show you exactly where the error is and what's wrong, making it easy to fix JSON validation issues.

Can I format large JSON files?

Yes! JSON Formatter Online is optimized to handle large JSON files efficiently. The collapsible structure helps you navigate even complex JSON data easily, and our tool maintains good performance even with large files.

Is JSON Formatter Online free to use?

Yes! JSON Formatter Online is completely free to use with no hidden costs or limitations. You can format, validate, and beautify your JSON data as many times as you want.

Is my JSON data secure?

Absolutely! All JSON formatting and validation happens directly in your browser. We never store, transmit, or process your JSON data on our servers. Your data remains completely private and secure.

Which browsers are supported?

JSON Formatter Online works perfectly in all modern browsers including Chrome, Firefox, Safari, and Edge. The tool is also fully responsive and works great on mobile devices.

Can I use JSON Formatter offline?

Once you've loaded JSON Formatter Online in your browser, you can continue to use it even without an internet connection. This makes it perfect for working with sensitive data or in environments with limited connectivity.

How to connect with us

We welcome your feedback and suggestions! Please feel free to contact us at [email protected]