JSON Formatter

A professional, fast, and feature-rich JSON formatting tool built with vanilla JavaScript

🚀 Live Demo • 📖 Documentation • 🐛 Report Bug • 💡 Request Feature

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📋 Table of Contents

• ✨ Features
• 🚀 Quick Start
• 🛠️ Usage
• ⌨️ Keyboard Shortcuts
• 🏗️ Architecture
• 🚀 Deployment
• 🛠️ Technologies
• 📱 Browser Support
• 🤝 Contributing
• 📄 License

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✨ Features

🎯 Core Functionality

• 🔄 JSON Formatting - Convert minified JSON to beautifully formatted, readable code
• 🔍 JSON Validation - Real-time syntax validation with detailed error reporting
• 📦 JSON Minification - Compress JSON to reduce file size
• 🎨 Syntax Highlighting - Color-coded JSON elements for better readability
• 🔧 Auto-Fix Errors - Automatically correct common JSON syntax issues

🚀 Advanced Features

• 📋 Clipboard Integration - One-click copy/paste functionality
• 💾 File Export - Download formatted JSON as .json files
• 📁 File Upload - Upload and process JSON files directly
• 🔗 URL Loading - Load JSON data from remote URLs
• 🌳 Tree View - Interactive hierarchical view of JSON structure
• 🔍 Search & Filter - Find specific keys or values within JSON
• 📊 Statistics - View file size, depth, key count, and array statistics
• ⚙️ Customizable Options - Sort keys, multiple indent options, and JSON standards
• ⌨️ Keyboard Shortcuts - Power user shortcuts for faster workflow
• 📱 Responsive Design - Optimized for desktop, tablet, and mobile devices
• 🌙 Modern UI - Clean, professional interface with smooth animations

🔧 Developer Features

• 🚫 No Dependencies - Pure vanilla JavaScript, no frameworks required
• ⚡ Fast Performance - Optimized for large JSON files
• 🔒 Privacy-First - All processing happens client-side, no data sent to servers
• ♿ Accessibility - WCAG compliant with keyboard navigation support
• 📏 Multiple JSON Standards - Support for RFC 8259, RFC 7159, RFC 4627, and ECMA-404
• 🎯 Flexible Indentation - 2, 3, 4 spaces or tab indentation options

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🚀 Quick Start

Option 1: Use Online (Recommended)

Visit the live application: https://koniz-dev.github.io/json-formatter

Option 2: Run Locally

# Clone the repository
git clone https://github.com/koniz-dev/json-formatter.git
cd json-formatter

# Open in browser (no build process required)
open index.html
# or
python -m http.server 8000
# then visit http://localhost:8000

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🛠️ Usage

Basic JSON Formatting

1. Input: Paste, type, upload, or load JSON from URL
2. Format: Click "Format JSON" or press Ctrl+Enter
3. Output: View the formatted result with syntax highlighting

JSON Validation

1. Input: Enter JSON to validate
2. Validate: Click "Validate" button
3. Result: See validation status with error details if invalid
4. Auto-Fix: Enable auto-fix to automatically correct common errors

Input Methods

• 📝 Manual Input: Type or paste JSON directly
• 📁 File Upload: Click "Upload File" to select a .json file
• 🔗 URL Loading: Click "Load URL" to fetch JSON from a remote URL
• 💡 Example: Click "Example" to load sample JSON data

Advanced Options

• Sort Keys: Automatically alphabetize object keys
• Indentation: Choose 2, 3, 4 spaces or tab indentation
• JSON Standard: Select from RFC 8259, RFC 7159, RFC 4627, or ECMA-404
• Auto-Fix Errors: Automatically correct common JSON syntax issues
• Minify: Compress JSON to minimal size

View Options

• 🌳 Tree View: Switch to interactive hierarchical view
• 🔍 Search: Find specific keys or values within JSON
• 📊 Statistics: View file size, depth, key count, and array statistics

Export Options

• Copy: Copy formatted JSON to clipboard
• Download: Save as .json file

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⌨️ Keyboard Shortcuts

Shortcut	Action	Description
Ctrl+Enter	Format JSON	Format the current input
Ctrl+K	Clear All	Clear input and output
Ctrl+Shift+C	Copy Result	Copy output to clipboard
Ctrl+V	Paste	Paste from clipboard (when input focused)
Ctrl+U	Upload File	Open file upload dialog
Ctrl+L	Load URL	Open URL loading modal
Ctrl+F	Search	Focus search input
Ctrl+T	Tree View	Toggle tree view mode
Ctrl+E	Example	Load example JSON
Escape	Close Modal	Close any open modal

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🏗️ Architecture

json-formatter/
├── 📄 index.html          # Main application structure
├── 🎨 styles.css          # Responsive styling and animations
├── ⚡ script.js           # Core application logic
├── 📖 README.md           # Project documentation
├── 📄 LICENSE             # MIT License
├── 🚫 .gitignore          # Git ignore rules
└── 🖼️ favicon/            # Favicon assets
    ├── favicon.ico
    ├── favicon-16x16.png
    ├── favicon-32x32.png
    ├── apple-touch-icon.png
    └── site.webmanifest

Key Components

• JSONFormatter Class: Main application controller with comprehensive functionality
• Syntax Highlighter: Custom JSON syntax highlighting engine
• Error Handler: Comprehensive error reporting system with auto-fix capabilities
• Clipboard Manager: Cross-browser clipboard integration
• File Exporter: Client-side file download functionality
• URL Loader: Remote JSON fetching with CORS handling
• File Upload Handler: Local file processing and validation
• Tree View Renderer: Interactive hierarchical JSON visualization
• Search Engine: Real-time JSON content search and filtering
• Statistics Calculator: JSON structure analysis and metrics
• Modal Manager: User interface modal handling
• Toast Notification System: User feedback and status messages

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🚀 Deployment

GitHub Pages (Current)

This project is automatically deployed to GitHub Pages:

1. Repository: koniz-dev/json-formatter
2. Live URL: https://koniz-dev.github.io/json-formatter
3. Auto-deploy: Updates automatically on every push to main branch

Custom Deployment

Deploy to any static hosting service:

# Build (no build process needed - just copy files)
cp -r . /path/to/web/server/

# Or use with any static site generator
# Files are ready for Netlify, Vercel, AWS S3, etc.

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🛠️ Technologies

Core Technologies

• HTML5 - Semantic markup and modern web standards
• CSS3 - Advanced styling with Flexbox, Grid, and animations
• Vanilla JavaScript (ES6+) - Modern JavaScript without frameworks
• Web APIs - Clipboard API, File API, Blob API, and Fetch API

External Resources

• Google Fonts - Inter font family for typography
• Font Awesome 6.0 - Professional icon set via CDN
• CSS Gradients - Modern visual design
• Web App Manifest - PWA capabilities

Performance Optimizations

• Debounced Input - Optimized real-time validation and search
• Efficient Parsing - Fast JSON processing with error recovery
• Minimal DOM Manipulation - Smooth user experience
• Event Delegation - Optimized event handling
• Lazy Loading - Resources loaded on demand
• Memory Management - Efficient tree view rendering
• Caching - Smart caching for URL-loaded content

Browser APIs Used

• Clipboard API - Copy/paste functionality
• File API - File upload and processing
• Blob API - File download generation
• Fetch API - Remote JSON loading
• URL API - URL validation and processing
• History API - Browser history management

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📱 Browser Support

Browser	Version	Support
Chrome	60+	✅ Full Support
Firefox	55+	✅ Full Support
Safari	12+	✅ Full Support
Edge	79+	✅ Full Support
IE	11+	⚠️ Limited Support

Feature Support

• Clipboard API: Modern browsers only (Chrome 66+, Firefox 63+, Safari 13.1+)
• File Download: All supported browsers
• File Upload: All supported browsers
• URL Loading: All supported browsers (with CORS support)
• JSON Parsing: Universal support
• Tree View: All supported browsers
• Search & Filter: All supported browsers
• Statistics: All supported browsers

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🤝 Contributing

We welcome contributions! Here's how you can help:

🐛 Bug Reports

1. Check existing issues
2. Create a new issue with detailed description
3. Include browser version and steps to reproduce

💡 Feature Requests

1. Open an issue
2. Describe the feature and its benefits
3. Use the "enhancement" label

🔧 Code Contributions

1. Fork the repository
2. Create a feature branch: git checkout -b feature/amazing-feature
3. Make your changes
4. Test thoroughly
5. Commit: git commit -m 'Add amazing feature'
6. Push: git push origin feature/amazing-feature
7. Open a Pull Request

📋 Development Guidelines

• Follow existing code style
• Add comments for complex logic
• Test on multiple browsers
• Ensure responsive design
• Update documentation if needed

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📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

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