JSON Formatter
Format, validate, and beautify JSON data. Minify compressed JSON or expand it with proper indentation for readability.
About This Free Online JSON Formatter
Format, beautify, minify, and validate JSON data with our free online JSON formatter. Paste any JSON string and instantly see it formatted with proper indentation for readability. Invalid JSON is highlighted with an error message showing where the problem is. Choose between pretty-print (expand) or minify (compress) modes. Supports adjustable indent width (2 or 4 spaces, or tabs). Perfect for developers working with API responses, configuration files, or any JSON data.
Features of Our JSON Formatter
- Beautify JSON with proper indentation
- Minify JSON to compact single-line format
- Validate JSON syntax with error highlighting
- Adjustable indent size (2 spaces, 4 spaces, tabs)
- Copy formatted/minified JSON to clipboard
- 100% private — browser-only processing
How to Use the JSON Formatter
Using this tool is simple and requires no signup or registration. Follow these steps:
- Paste your JSON data into the input area.
- Choose Format (beautify) or Minify (compress).
- For Format mode, select your preferred indent size.
- Click Copy to save the result.
Frequently Asked Questions About JSON Formatter
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It uses key-value pairs and ordered lists to represent structured data.
What happens if my JSON is invalid?
The tool validates your JSON and shows an error message if it is not valid. Invalid JSON will not be formatted — the error will point to where the problem occurs so you can fix it.
Why Choose Text Toolbox?
Text Toolbox provides free, private, and instant online text tools. Unlike other text utility websites that require signup accounts or send your data to servers, all our tools process your text entirely in your browser. This means your content never leaves your device — we cannot see it, store it, or share it. Our tools are fast, lightweight, and work on any device with a modern web browser.