JSON Formatter & Validator - Beautify JSON Instantly
Paste your messy JSON data and instantly format, validate, and beautify it. Our free online tool highlights errors with line numbers, minifies for compact output, and displays your data in an easy-to-read tree view.
Validation
Statistics
Powerful JSON Tools - Everything You Need in One Place
Work smarter with features designed for developers, data analysts, and anyone working with JSON data.
Format & Beautify
Transform messy JSON into clean, readable code with proper indentation. Choose 2 or 4 space formatting for easy debugging.
Validate JSON
Catch syntax errors instantly with highlighted line numbers and clear error messages. Fix issues before they break your code.
Minify JSON
Remove whitespace and compress your JSON for faster loading and efficient data transfer in production.
Tree View
Explore complex JSON structures with collapsible tree visualization. Navigate nested data effortlessly.
JSON Editor
Edit JSON directly in the browser with syntax highlighting and auto-completion. Make quick changes without switching tools.
Dark Mode
Switch between light and dark themes for comfortable coding in any environment. Easy on the eyes during long sessions.
How to Use JSON Formatter - Simple Steps
Format and validate your JSON data in seconds with our easy-to-use tool.
Paste or Upload Your JSON
Copy your JSON data and paste it into the editor, upload a JSON file, or type directly in the code editor.
Choose Your Action
Click Format to beautify, Minify to compress, or Validate to check for errors. Switch between Editor and Tree view as needed.
Copy or Download
Use the Copy button to grab your formatted JSON or Download to save it as a file. Check validation status and statistics on the right panel.
Frequently Asked Questions
What is a JSON Formatter?
A JSON formatter is an online tool that transforms messy, unreadable JSON data into clean, properly indented code. It adds line breaks and spacing to make your JSON easy to read and debug. Our formatter also validates syntax and highlights errors automatically.
Is my JSON data safe? Do you store it?
Yes, your data is completely safe. All formatting and validation happens directly in your browser—nothing is sent to our servers. Your JSON never leaves your device, ensuring 100% privacy and security.
What's the difference between Format and Minify?
Format (or beautify) adds indentation and line breaks to make JSON readable for humans. Minify does the opposite—it removes all whitespace to create the smallest possible file size, ideal for production environments and faster data transfer.
How do I fix JSON syntax errors?
Simply paste your JSON and it will be automatically validated in real time. Our tool will highlight errors with exact line numbers and clear error messages. Common issues include missing commas, unclosed brackets, or incorrect quotes. Fix the highlighted issues and validate again until you see "Valid JSON."
Can I upload JSON files instead of pasting?
Yes! Click the Upload button to select a JSON file from your computer. The tool works with files of any size and will instantly display your data in the editor for formatting, validation, or viewing in tree structure.
What is Tree View and when should I use it?
Tree View displays your JSON as a collapsible, hierarchical structure—like a file explorer. It's perfect for navigating complex, deeply nested JSON with multiple levels. You can expand or collapse sections to focus on specific parts of your data without getting overwhelmed.
Do I need to create an account or sign up?
No! Our JSON formatter is completely free and requires no registration. Just visit the site, paste your JSON, and start formatting. No emails, no passwords, no hassle.
What does the Statistics panel show?
The Statistics panel on the right displays useful information about your JSON: total characters, line count, file size in KB, nesting depth, and the number of keys, objects, and arrays. This helps you understand the structure and size of your data at a glance.
Can I use this tool for API responses?
Absolutely! Our formatter is perfect for working with API responses. Paste the JSON response from your API call, format it for readability, and validate it to ensure there are no errors.
Does this work offline?
Once you load the page, the tool runs entirely in your browser using JavaScript. However, you need an initial internet connection to access the website. After that, all processing happens locally on your device.