Edit and format JSON data easily
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A JSON (JavaScript Object Notation) Editor is a specialized tool for viewing, editing, validating, and formatting JSON data. JSON is the most widely used data interchange format on the web, powering APIs, configuration files, and data storage across virtually every modern application. This online JSON editor provides real-time syntax validation, automatic formatting, a visual tree view for exploring nested structures, and conversion capabilities to other formats like YAML and CSV — all running entirely in your browser without uploading any data.
Enter JSON
Enter JSON data directly into the code editor, or load the JSON file using the ‘Load File’ button.
Validation
The JSON syntax is automatically verified as you enter it. If there is an error, the error location and message will be displayed at the bottom of the editor.
Apply formatting
Click the Ctrl+Shift+F shortcut or the formatting button to convert it to a more readable format with organized indentation.
Switch Views
View your data in different ways by choosing your preferred view mode: code view, tree view, or split view.
Convert and Download
Once editing is complete, download it as a JSON file, or convert it to YAML/CSV format and use it for other purposes.
JSON Formatting (Pretty Print) is converting compressed JSON data into a human-readable format by adding appropriate indentation and line breaks. Minify, on the other hand, minimizes file size by removing unnecessary spaces and line breaks.
The tree view is very useful for visually exploring deeply nested JSON structures. Each node can be collapsed or expanded, allowing you to quickly find specific parts of large JSON data and visually distinguish between data types (strings, numbers, arrays, etc.).
No. All editing and conversion operations are handled locally in your browser. The JSON data you enter will not be transmitted or stored on any server, so even sensitive configuration files or API response data can be handled safely.
JSON has a strict syntax using curly braces and double quotes and is suitable for data exchange between programming languages. YAML is more readable based on indentation and supports comments, making it popular for configuration files (Docker Compose, Kubernetes, etc.).
The most common causes include a trailing comma after the last item, use of single quotes (only double quotes are allowed), and missing quotes in keys. Check the error location displayed by the editor and check the syntax of the line. Formatting features make it easy to spot structural errors.