OneJSON

Professional JSON file editor with syntax support, formatting, and validation. Created for developers who value productivity and convenience.

Download for Windows
Download for macOS

Editor Features

Code View

Classic code view with syntax highlighting, line numbers, and code folding for precise editing.

Split View

Side-by-side viewing and editing with synchronized scrolling and instant updates. Perfect for comparing and merging JSON data.

Tree View

Hierarchical tree view for easy navigation and editing of complex JSON structures.

Visualizing JSON Structure

Powerful tool for visual analysis and understanding of complex JSON structures. It transforms text data into interactive diagrams, making work with JSON more intuitive and efficient.

Automatic alignment and optimization of element placement
Scaling and panning for easy navigation
Exporting the diagram in various formats
Diagram View Preview
example.json 1.2 KB
Get

Powerful Editor Interface

Experience the power and flexibility of our modern JSON editor with advanced features and intuitive interface.

Powerful Editor Interface

Powerful Editor

Modern, intuitive interface with syntax highlighting and code folding

Real-time Validation

Split View

It's easy to add and move items, and then adjust them in real time

Smart Formatting

Native interface

Adapts to the theme and color of your device

Customizable Themes

Tree View

Edit easily, shuffle and add in seconds, even without knowing the JSON structure

Native Experience & Auto-Updates

Platform-Native Design

Seamlessly integrates with your operating system's native look and feel. From window controls to context menus, everything feels natural and familiar.

  • Native system fonts and controls
  • System-specific keyboard shortcuts
  • Dark/Light mode sync with OS

Seamless Updates

Always stay up to date with automatic background updates. New features and security patches are installed silently without interrupting your work.

  • Background downloads
  • Silent installation
  • Automatic restart prevention during editing

Frequently Asked Questions

How to install OneJSON?

Simply download the installer for your operating system and follow the instructions. The program will automatically configure and be ready for use.

Does OneJSON support working with large files?

Yes, OneJSON is optimized for working with JSON files of any size. The built-in virtualization system allows for efficient processing of files up to several gigabytes.

Is there automatic saving?

Yes, OneJSON automatically saves all changes and has a versioning system that allows you to restore previous versions of the file.

Can OneJSON be used for working with APIs?

Yes, OneJSON has built-in tools for testing APIs, sending requests, and formatting responses. It supports working with REST, GraphQL, and other types of APIs.

Why choose OneJSON?

Intuitive interface with dark theme support
Instant JSON validation in real time
Automatic formatting and syntax highlighting
Convenient navigation through large JSON files
Support for importing and exporting various formats
Work in offline mode without internet

Download OneJSON

Download for Windows
v1.0 53,4 MB 15.03.2025
Download for macOS
v1.0 30,5 MB 15.03.2025
Intel Core i3 / AMD Ryzen 3
100 MB RAM
100 MB
Windows 7+
Intel Core i3 / M1
100 MB RAM
100 MB
macOS X+