Is my data sent to a server?

No. All processing happens in your browser. Your JSON never leaves your device.

What's the maximum JSON size?

There's no hard limit, but very large files (>10MB) may slow down your browser.

Is my data sent to a server?

No. All processing happens in your browser. Your JSON never leaves your device.

What's the maximum JSON size?

There's no hard limit, but very large files (>10MB) may slow down your browser.

Free

JSON Formatter & Validator

Format, minify, and validate JSON with syntax highlighting and structure analysis.

100% FreeNo Signup RequiredRuns in Your Browser

Indent:

Input

Output

Output will appear here...

About JSON Formatter & Validator

Paste JSON to format with custom indentation, minify for production, or validate structure. Shows key counts, nesting depth, and data type breakdown. Works entirely in your browser.

Frequently Asked Questions

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