Professional JSON formatter and converter with auto-formatting, syntax highlighting, and code generation.
Users
6
−1 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#242K
#202K among extensions
Version
1.1.0
updated 19 Oct 2025
Users
monthly, 13 months
Latest, 16 Oct 2026:6 usersMove the mouse over the chart for any month
Ratings count
monthly, 13 months
Latest, 16 Oct 2026:0 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About JSON Master Pro
Transform Your JSON Workflow with JSON Master Pro
JSON Master Pro is a powerful Chrome extension designed for developers, data analysts, and anyone who works with JSON data. It brings professional-grade JSON formatting and conversion tools directly to your browser.
KEY FEATURES
Auto-Formatting & Validation
• Automatically detects and formats JSON content on web pages
• Beautiful syntax highlighting with collapsible structure
• Real-time JSON validation with detailed error messages
• Toggle auto-formatting on/off for any website
Multi-Language Code Conversion
• Convert JSON to Java classes with getters/setters and constructors
• Generate Golang struct definitions with JSON tags
• Generate Python class definitions with properties and helper methods
• Create TypeScript class definitions with methods
• Build Protocol Buffer message definitions
• Convert to XML format with proper structure
Developer Tools
• Minifier for production-ready JSON
• Copy to clipboard functionality
• Download formatted JSON as file
• Right-click context menu integration
• Line numbers and collapsible structure (like VSCode)
Smart Features
• Intelligent JSON detection on web pages
• Multiple themes (Dark, Light, Cyber)
• Responsive design for all screen sizes
• Performance optimized for large JSON files
• Local processing - no data sent to external servers
PERFECT FOR
• Web Developers: Format API responses, validate JSON configs
• API Developers: Convert schemas to language-specific types
• Data Analysts: Format large JSON datasets, validate data integrity
• Students: Learn JSON structure with visual formatting
• QA Engineers: Validate API responses and data formats
PRIVACY & SECURITY
• 100% Local Processing: All JSON processing happens in your browser
• No Data Collection: We don't collect, store, or transmit your data
• No External Requests: No data sent to external servers
• Secure: Follows Chrome extension security best practices
BEAUTIFUL INTERFACE
• Modern, tech-inspired design
• Multiple themes to match your preference
• Smooth animations and interactions
• Responsive design works on all screen sizes
PERFORMANCE
• Lightweight with minimal memory footprint
• Optimized for large JSON files
• Smart detection reduces unnecessary processing
• Fast parsing and formatting algorithms
EASY TO USE
1. Auto-Formatting: JSON content is automatically detected and formatted on web pages
2. Popup Interface: Click the extension icon for advanced formatting and conversion tools
3. Context Menu: Right-click on JSON text for quick formatting and conversion options
4. Settings: Customize themes, toggle features, and adjust preferences
WORKS EVERYWHERE
• GitHub, Stack Overflow, API documentation sites
• JSON API endpoints and responses
• Configuration files and data files
• Any website with JSON content
REGULAR UPDATES
We continuously improve JSON Master Pro with new features, performance optimizations, and bug fixes based on user feedback.
WHY CHOOSE JSON MASTER PRO?
• Professional Grade: Built with developers in mind
• Feature Rich: More than just a formatter - it's a complete JSON toolkit
• Privacy Focused: Your data stays on your device
• Performance Optimized: Handles large files efficiently
• Beautiful Design: Modern, intuitive interface
• Free: No cost, no ads, no tracking
Transform your JSON workflow today with JSON Master Pro!
Growth
Window
Users
Change
Ratings
Rating
7 days
−2
−25.0%
0
0.00
30 days
−1
−14.3%
0
0.00
6 months
+4
+200.0%
0
0.00
1 year
+5
+500.0%
0
0.00
Chrome Web Store search rankings
Where JSON Master Pro appears when people search the store, with the 30 day change