JSON Formatter
FeaturedDeveloper ToolsA powerful JSON formatter and validator with syntax highlighting, tree view, minification, key sorting, and error detection. Perfect for developers working with APIs and data structures.
Input JSON
Output
Output will appear here
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Frequently Asked Questions
What is JSON formatting?
JSON formatting (or pretty-printing) adds indentation and newlines to make JSON data human-readable, while minification removes whitespace to reduce file size.
Is my JSON data sent to a server?
No — all formatting happens entirely in your browser. Your data never leaves your device.
Can it handle large JSON files?
Yes, the tool handles JSON files of any size. Very large files may take a moment to render the tree view.
How do I sort JSON keys?
Use the "Sort Keys" option to alphabetically sort all object keys at every level of nesting.