JSON Editor is a powerful, free web-based tool designed to help developers, data analysts, and anyone working with JSON data to view, edit, format, and validate JSON documents with ease. Our editor provides a professional environment for working with JSON data structures in multiple viewing modes.
Whether you're debugging API responses, configuring application settings, or managing data files, our JSON Editor offers an intuitive interface with advanced features that make JSON manipulation simple and efficient.
Professional code editor with color-coded JSON syntax for easy reading and editing.
Visualize your JSON structure in an expandable/collapsible tree format for better understanding.
View arrays of objects in a clean, organized table format for data analysis.
Real-time JSON validation with detailed error messages to help you fix issues quickly.
Beautify messy JSON or compact it to save space with one click.
Compare, copy, and transform JSON between two side-by-side editors.
Automatically sort object keys alphabetically for consistent formatting.
Full history support to revert changes or restore previous versions.
Open JSON files from your computer or download your edited JSON instantly.
Privacy First: All JSON processing happens in your browser. Your data never leaves your computer and is not sent to any server.
Our JSON Editor is designed to be intuitive and easy to use. Follow these simple steps to get started:
Simply type or paste your JSON data into the left editor panel. You can also open a JSON file from your computer using the "Open" button in the header.
Switch between Text, Tree, and Table views using the tabs above each editor panel. Text view is best for editing, Tree view for understanding structure, and Table view for analyzing data arrays.
Use the toolbar buttons to format (prettify), compact (minify), or sort your JSON. The editor validates your JSON in real-time and shows errors if any.
Use the middle panel buttons to copy or transform JSON between the left and right editors. This is useful for comparing different versions or restructuring data.
Click "Save" to store your JSON in browser storage for later, or "Download" to save it as a .json file to your computer.
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. It's commonly used for APIs, configuration files, and data storage.
Absolutely safe! All JSON processing happens entirely in your browser using JavaScript. Your data is never sent to any server or stored anywhere except optionally in your browser's local storage (when you click Save). We have no access to your data.
Once the page is loaded, most features work offline. However, the initial page load requires an internet connection to download the necessary libraries (CodeMirror, Bootstrap, jQuery).
Format (prettify) adds proper indentation and line breaks to make JSON human-readable. Compact (minify) removes all unnecessary whitespace to reduce file size, useful for production environments.
The error bar at the bottom shows specific error messages. Common issues include: missing commas, unclosed brackets/braces, trailing commas, unquoted keys, or single quotes instead of double quotes. The error message will indicate the line where the problem occurs.
The editor can handle reasonably large JSON files (several MBs), but performance depends on your browser and computer specifications. For very large files (100MB+), you might experience slower performance.
Yes! Use the dual-panel layout. Load one JSON file in the left editor and another in the right editor. You can then visually compare them side by side in any view mode (Text, Tree, or Table).
The Transform button parses the JSON from one panel and copies it to the other panel with proper formatting. It's useful for cleaning up and formatting JSON while keeping the original version intact.
Click the "Download" button in the header. This will download the JSON from the left editor as a .json file to your default downloads folder. The file will be named "data.json" by default.
Yes! JSON Editor is completely free to use with no registration required, no ads, and no limitations. Use it as much as you need for personal or commercial projects.