JSON Formatter & Viewer

Mode:

Indent:

키 정렬

Input JSON

Output

Results will be shown here.

Last updated: 2026 · Free online tool

What is JSON Formatter & Viewer?

Free online tool to format and beautify JSON data with tree view

1
Enter JSON — Paste your JSON data into the left input panel.
2
Select Options — Choose your preferred options such as indentation size and key sorting.
3
View Results — The formatted JSON is automatically displayed on the right.
4
Explore Tree View — Use the tree view tab to visually explore the JSON structure.
5
Copy or Download — Copy the result to clipboard or download it as a file.

A JSON formatter is a tool that organizes unformatted JSON data with proper indentation and line breaks for readability.

A formatter makes data visually readable, while a validator checks whether the JSON syntax is correct.

Yes, it can process JSON files of several MB within the browser's memory limit.

Yes, you can choose between 2 spaces, 4 spaces, or tabs.

Yes, you can enable the 'Sort Keys' option in the settings.