JSON Formatter / Validator

Beautify, minify, and validate JSON in one click. Instantly spot syntax errors and download clean, formatted output.

How to Use

1

Paste Your JSON

Copy your JSON data from any source — an API response, a config file, or a database export — and paste it into the input textarea above.

2

Beautify or Minify

Click "Beautify" to format the JSON with proper indentation and line breaks for easy reading. Click "Minify" to collapse it into a single compact line, ideal for production use or reducing file size.

3

Validate for Errors

Click "Validate" to check whether your JSON is syntactically correct. If there are errors, a red error box will appear with the exact error message, helping you pinpoint the problem quickly.

4

Copy or Download the Output

Once your JSON is formatted, use the "Copy" button to copy it to your clipboard, or click "Download" to save it as a .json file to your computer.

Frequently Asked Questions

JSON (JavaScript Object Notation) is a lightweight, human-readable data format used to store and exchange structured data. It is widely used in web APIs, configuration files, and databases. JSON data is built from key-value pairs and ordered lists.

Beautify (also called "pretty-print") formats JSON with 2-space indentation and newlines, making it easy to read and debug. Minify removes all unnecessary whitespace and newlines, producing the most compact version of the JSON — useful for reducing payload size in network requests.

Common reasons include: missing or extra commas, unquoted keys, single quotes instead of double quotes, trailing commas after the last item in an array or object, or mismatched brackets and braces. The error message shown in red will help you identify the exact issue.

Yes. The formatter handles deeply nested JSON objects and arrays with no issues. Each nested level is indented by 2 spaces, making it easy to follow the structure no matter how complex the data is.

There is no hard size limit imposed by this tool — processing is done entirely in your browser. Very large files (several MB) may be slow depending on your device's memory and processing power, but for typical use cases the tool handles them without any problems.