Online Formatter

Format and beautify JSON, XML, HTML, CSS, and SQL code with proper indentation and syntax highlighting.

Request Feature / Support

5,252+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Online Formatter processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

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About This Tool

This online formatter tool helps developers and content creators format their code for better readability. Simply paste your JSON, XML, HTML, CSS, or SQL code, select the format type, and get perfectly indented, beautified output instantly. The tool handles syntax validation, provides error messages for invalid code, and displays formatted results with visual syntax highlighting. No server-side processing required - everything runs securely in your browser.

Save your calculation history with a free account

How to Use

Paste your unformatted code into the text area
Select the appropriate format type (JSON, XML, HTML, CSS, or SQL)
Click the 'Format Code' button
View the formatted result in the output section
Use the 'Copy to Clipboard' button to copy the formatted code
Use 'Clear All' to reset the tool for a new formatting task

Frequently Asked Questions

Find Quick Answers

What code formats does this tool support?

The tool supports formatting for JSON, XML, HTML, CSS, and SQL code. Each format has specific validation and formatting rules.

Does this tool require an internet connection after loading?

No, once the page loads, all formatting happens client-side in your browser. No data is sent to any server.

What happens if I paste invalid code?

The tool will validate your code and show specific error messages indicating what's wrong with the syntax. Invalid fields will be highlighted in red.

Can I format very large files?

Yes, but extremely large files may impact browser performance since processing happens client-side. For best results, format code in reasonable chunks.

Does the tool save or store my code?

No, all processing happens locally in your browser. Your code never leaves your device or gets stored on any server.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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