JSON Formatter
Paste your JSON to format, validate, and minify it.
About JSON Formatter
JSON (JavaScript Object Notation) is a lightweight data interchange format. This tool formats (beautifies) or minifies JSON data instantly. All processing happens in your browser — your data never leaves your device.
Features
Format JSON with proper indentation, minify to reduce file size, validate syntax with detailed error messages, and copy output with one click.
How to Use
Paste your JSON data into the input field on the left. Click "Format" to beautify the JSON with proper indentation, or "Minify" to compress it into a single line. The output will appear on the right. If your JSON contains syntax errors, the tool will display a detailed error message showing the exact location of the problem.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write. It is commonly used for transmitting data between a server and a web application, as well as for configuration files and data storage. A JSON object consists of key-value pairs enclosed in curly braces, and arrays are ordered lists enclosed in square brackets.
Common JSON Errors
Missing commas between properties, trailing commas after the last item, unquoted property names, single quotes instead of double quotes, and missing closing brackets are the most common JSON syntax errors. This formatter helps you identify and fix all of these issues instantly.