JSON Formatter & Viewer
Results will be shown here.
Last updated: 2026 · Free online tool
What is JSON Formatter & Viewer?
Free online JSON formatter and viewer that beautifies minified or single-line JSON with proper indentation, lets you explore the structure in a collapsible tree view, and flags syntax errors
How to Use
- 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.
Related Tools
JSON Validator Free online JSON validator that instantly checks whether a JSON string is syntactically valid and, on error, pinpoints the exact line and column with the cause to fix missing commas or quotes fast
JSON Diff Free online JSON diff tool that compares two JSON objects side by side, color-highlighting added, deleted, and changed keys while deeply traversing nested structures so every difference stands out
Frequently Asked Questions
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.