JSON Beautifier, Formatter & Viewer

Free JSON Beautifier & Formatter Tool

• JSON Beautifier: Transform compact, minified JSON into readable, properly indented code with customisable indentation (2 spaces, 4 spaces, or tabs).
• JSON Formatter: Automatically format and structure your JSON data with consistent styling, making it easier to read and understand complex data structures.
• JSON Viewer: Explore your JSON with syntax highlighting and an interactive tree view. Collapse and expand nested objects and arrays to navigate large datasets.
• JSON Validator: Real-time validation identifies syntax errors instantly, showing you exactly where the problem is with helpful error messages.
• JSON Cleaner: Automatically fix common JSON issues including trailing commas, single quotes, unquoted keys, and JavaScript-style comments.
• JSON Minifier: Compress your JSON by removing all unnecessary whitespace, perfect for reducing file size in production environments.
• Sort Keys: Alphabetically sort all object keys for consistent ordering, making diffs easier and improving readability.
• Statistics: View detailed stats about your JSON including size, depth, key count, and data types used.

How to Use the JSON Beautifier

• Paste or upload your JSON: Paste JSON directly into the input area, use the Paste button, or upload a .json file from your computer.
• Click Beautify: Instantly format your JSON with proper indentation. Choose your preferred indent size (2 spaces, 4 spaces, or tabs).
• View the results: Switch between Formatted (plain text), Highlighted (syntax coloured), or Tree View (interactive explorer) to see your data.
• Fix errors: If your JSON has issues, click "Clean & Fix" to automatically correct common problems like trailing commas or quote issues.
• Copy or download: Copy the formatted JSON to your clipboard or download it as a .json file for use in your projects.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data interchange format that's easy for humans to read and write, and easy for machines to parse and generate. It's the standard format for API responses, configuration files, and data storage across web applications. JSON consists of key-value pairs organised in objects (curly braces) and arrays (square brackets), supporting strings, numbers, booleans, null values, and nested structures.

Why Beautify JSON?

Minified JSON saves bandwidth but is nearly impossible to read. A JSON beautifier adds proper indentation and line breaks, making the structure visible at a glance. This is essential for debugging API responses, reviewing configuration files, understanding data schemas, and collaborating with other developers. The JSON formatter processes everything locally in your browser, ensuring your sensitive data never leaves your machine.