JSON Formatter

JSON Formatter is a powerful online tool for working with JSON data that beautifies minified JSON, validates JSON syntax, and provides instant formatting with customizable indentation. Whether you're a developer debugging API responses, a data analyst cleaning up data exports, or a student learning about JSON structure, this tool makes complex JSON data readable and manageable. The formatter includes three essential modes: beautify for adding proper indentation and line breaks to minified JSON, minify for removing all whitespace to reduce file size, and validate for checking JSON syntax errors with detailed error messages. All processing happens entirely in your browser using JavaScript's built-in JSON parser, ensuring your sensitive data never leaves your device or gets uploaded to any server. Common use cases include debugging API responses during development, formatting configuration files for better readability, validating JSON before saving to databases, preparing JSON data for documentation, and learning JSON structure through clear visualization. The tool handles deeply nested objects and large arrays efficiently, supporting JSON files of any complexity. Works with all modern browsers, requires no installation or signup, and provides instant results as you paste your JSON data. Perfect for daily development workflows and one-time JSON formatting needs.