JSON Editor and Tree Viewer

Paste your JSON data here...

About JSON Viewer

JSON Viewer is a modern, powerful JSON viewer and formatter designed for developers who work with JSON data daily. Built with performance and usability in mind, it provides an intuitive interface for visualizing, formatting, and navigating complex JSON structures.


Whether you're debugging API responses, analyzing configuration files, or exploring data structures, JSON Viewer offers a clean, expandable tree view with syntax highlighting that makes understanding JSON data effortless. The tool works entirely in your browser, ensuring your data remains private and secure.


With features like one-click formatting, expandable/collapsible nodes, dark and light themes, and real-time validation, JSON Viewer streamlines your JSON workflow and helps you work more efficiently with structured data.

Frequently Asked Questions

Are my JSON files saved or stored anywhere?

No, all processing happens locally in your browser. Your data is never saved or transmitted anywhere.

Does JSON Viewer work offline?

Yes, it works completely offline once loaded in your browser.

What's the maximum size of JSON I can process?

Performance depends on your device. We recommend files under 10MB for optimal performance.

Can I use JSON Viewer for commercial projects?

Yes, it's free for both personal and commercial use.

Latest Updates

July 10, 2025
Feature

Latest Updates Section

Added a new section to track feature releases and improvements, helping you stay informed about new capabilities.

July 10, 2025
Improvement

Performance & Search Improvements

Faster syntax highlighting, improved search accuracy, and smoother interface interactions.

June 25, 2025
Feature

Enhanced Theme & Analytics

Better theme persistence across sessions and privacy-focused usage analytics to improve the tool.

June 24, 2025
Feature

Search & Keyboard Shortcuts

Added Ctrl+F search with real-time highlighting and Tab key support for better editing workflow.

June 22, 2025
Release

Syntax Highlighting & Smart Formatting

Introduced color-coded JSON syntax, intelligent auto-formatting that fixes common errors, and improved accessibility.

June 21, 2025
Improvement

Performance Optimizations

Faster JSON processing, reduced memory usage for large files, and smoother theme switching.

June 20, 2025
Release

JSON Viewer Launch

Initial release with expandable tree view, dark/light themes, and real-time JSON validation.