JSON Formatter & Validator
Format and validate your JSON data with customizable indentation
What is a JSON formatter?
A JSON formatter is a tool that takes JSON data and formats it with proper indentation and line breaks, making it easier to read, debug, and maintain. It validates the JSON syntax while beautifying the structure.
How do I use the JSON formatter?
Simply paste your JSON data into the input field, select your preferred indentation size (2 or 4 spaces), and click 'Format JSON'. The tool will validate and beautify your JSON instantly.
Why should I format my JSON?
Formatting JSON makes it easier to read, debug, and maintain. Well-formatted JSON helps you quickly identify structure, spot errors, and understand nested data relationships at a glance.
Can this tool validate JSON syntax?
Yes! Our formatter automatically validates JSON syntax when formatting. You can also use the 'Validate Only' button to check if your JSON is valid without formatting it.
Is my JSON data safe when using this tool?
Absolutely! All processing happens entirely in your browser using JavaScript. Your JSON data never leaves your computer, ensuring complete privacy and security.
Can I format large JSON files?
Yes, our formatter can handle large JSON files efficiently. However, extremely large files (over 10MB) may take a few seconds to process depending on your device's performance.
What indentation style does the formatter use?
By default, the formatter uses 2-space indentation, which is the most common standard. You can switch to 4-space indentation using the toggle button for different coding style preferences.
Does the formatter work offline?
Yes! Once the page is loaded, the formatter works completely offline. All processing happens in your browser, so no internet connection is needed after the initial page load.
How do I fix syntax errors in JSON?
Common JSON errors include missing commas, trailing commas, unquoted keys, and mismatched brackets. The error message will show the line number and type of error to help you fix it quickly.
Can I customize the formatting options?
Currently, you can customize indentation size (2 or 4 spaces). The formatter follows JSON standards for quotes, commas, and brackets to ensure valid output that works everywhere.