JSON Formatter & Validator
Paste your JSON to format, beautify, minify, and validate it instantly.
Free Online JSON Formatter and Validator
The Toolts JSON Formatter takes raw or minified JSON data and formats it with proper indentation for easy reading. It also validates your JSON to catch syntax errors like missing brackets, trailing commas, or unquoted keys. You can switch between beautified (indented) and minified (compact) output with a single click.
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 is the most common format for API responses, configuration files, and data storage in web applications. JSON supports strings, numbers, booleans, arrays, objects, and null values.
When to Use This Tool
Use the formatter when debugging API responses, reviewing configuration files, or preparing JSON data for documentation. The minifier is useful for reducing file size before sending JSON data over a network. The validator catches common errors like missing commas, unclosed brackets, and trailing commas that would cause parsing failures in applications.