JSON Formatter & Validator
Format, minify, and validate JSON data with syntax highlighting
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JSON Formatting Guide

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.

Formatting: Pretty-prints JSON with proper indentation (2 spaces) and line breaks for better readability. Essential for debugging and code reviews.
Lenient Mode: Attempts to format even malformed JSON by fixing common issues like trailing commas, single quotes, and unquoted keys.
Strict Mode: Only formats valid JSON (traditional behavior).
• Auto-formats valid JSON as you type.

Minifying: Removes all unnecessary whitespace and line breaks to create compact JSON. Reduces file size and improves transmission speed.

Validation: Checks JSON syntax for errors like missing commas, unclosed brackets, or invalid characters. Helps identify issues before they cause problems.

File Support: Upload .json or .txt files to process large JSON data with security validation. Download results as properly formatted JSON files.

Keyboard Shortcuts:
Ctrl+Z Undo
Ctrl+Y Redo
Ctrl+Enter Process JSON

Features: History tracking, secure file uploads, error handling, real-time validation, horizontal scrolling for long lines, and adjustable textarea height make this tool safe and efficient for all your JSON processing needs.

Height Control: Use the height slider or +/- buttons to adjust textarea size (150px - 800px). Default height is 400px. Perfect for working with large JSON files or when you need more screen space.