JSON Formatter
Validate, format, and beautify JSON instantly. Real-time error detection, tree view, and one-click export. 100% free and private.
Input JSON
Output
About JSON Formatter
A JSON Formatter is an essential developer tool that validates, formats, and beautifies JSON (JavaScript Object Notation) data. It helps developers read, debug, and understand complex JSON structures by adding proper indentation and syntax highlighting.
Our JSON Formatter works entirely in your browser, ensuring your data never leaves your device. It supports real-time validation, error detection with line numbers, tree view visualization, and easy export options.
Key Features of JSON Formatter
Everything you need for professional json formatter
Real-time Validation
Instantly validates JSON syntax as you type with detailed error messages and line numbers.
Beautify & Minify
Format JSON with proper indentation or compress it to a single line for production use.
Interactive Tree View
Explore JSON structure visually with collapsible nodes and syntax highlighting.
File Upload Support
Upload JSON files directly from your computer for instant formatting and validation.
100% Client-Side
All processing happens in your browser. Your data never leaves your device.
Easy Export
Copy to clipboard or download formatted JSON as a file with one click.
How to Use JSON Formatter
Follow these simple steps to get started
Paste or Upload
Paste your JSON data or upload a .json file
Format or Minify
Click Format to beautify or Minify to compress
Copy or Download
Copy the result or download as a file
Pro Tips
- Use the Tree View to explore complex nested JSON structures easily
- Upload large JSON files directly instead of copy-pasting for better performance
- Minify JSON before sending to APIs to reduce payload size
- Check the error message for exact line and column of syntax errors
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Frequently Asked Questions
Everything you need to know about JSON Formatter
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 based on a subset of JavaScript but is language-independent.
Paste your JSON into the input area and click the "Format" button. The tool will validate your JSON and display it with proper indentation. You can also use "Minify" to compress JSON to a single line.
Tree View presents your JSON as an interactive, collapsible tree structure. You can expand/collapse objects and arrays to explore nested data easily. Each data type is color-coded for quick identification.
Yes! All processing happens entirely in your browser using JavaScript. Your JSON data never leaves your device or gets sent to any server, ensuring complete privacy and security.
Absolutely! Paste any minified or compressed JSON and click Format. The tool will expand it with proper indentation, line breaks, and spacing for easy reading.
You can upload .json files directly. The tool will read the file contents and automatically validate and format the JSON data.
Still need help?
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