JSON Formatter & Validator

Format, validate, beautify and minify JSON data instantly. Free online tool with tree view and error detection.

Input JSON

Output

Formatted JSON will appear here...

About JSON Formatter

Our JSON Formatter is a free, client-side tool that helps developers format, validate, beautify, and minify JSON data instantly. Whether you're debugging API responses, editing configuration files, or working with complex data structures, this tool provides instant feedback and clear error reporting.

Key Features

Format & Beautify: Convert compact JSON into a readable, indented structure with proper spacing.
Validate: Instantly check if your JSON is syntactically correct with detailed error messages including line numbers.
Minify: Remove all unnecessary whitespace to reduce file size for production use.
Tree View: Toggle to an interactive collapsible tree representation of your data.
Statistics: See object count, array count, and maximum nesting depth at a glance.
Copy to Clipboard: One-click copy of formatted output for quick sharing.

All processing happens entirely in your browser. Your data never leaves your device, making this tool safe for sensitive information.

FAQ

Is my JSON data sent to a server?

No. All formatting and validation happens entirely in your browser. Your data never leaves your device.

What's the maximum JSON size I can format?

There's no hard limit set by the tool, but very large files (tens of MB) may slow down your browser.

Does this tool support JSON with comments?

No, this tool follows standard JSON specification which does not allow comments. Remove comments before formatting.

How does the tree view work?

The tree view renders your JSON as a collapsible hierarchy. Click the toggle buttons to expand or collapse nodes.

JSON Formatter & Validator

About JSON Formatter

Key Features

FAQ

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