JSON Formatter

Prettify, validate, format, and indent JSON data with custom spacing and instant syntax highlighting.

How to Use JSON Formatter

Paste raw, minified, or unformatted JSON text.

Select 2-space or 4-space indentation.

Copy beautified JSON directly or download as a .json file.

Software engineers, QA testers, API developers, and data architects formatting messy or minified JSON payloads.

Supports single JSON payload up to 10MB.

Can this tool format invalid JSON?

If your JSON contains syntax errors, ConvertNest points out the exact line and character so you can fix it immediately.

Is my source code, JSON, or payload data sent to external servers?

Can I convert multiple files in batch at the same time?

What is the maximum file size limit for JSON Formatter?

Is JSON Formatter safe and secure for sensitive or confidential files?

Do I need to install any software, browser extensions, or plugins?

Decode percent-encoded (%20, %26, %3D) URLs and query parameters back into human-readable text.

Validate JSON syntax in real-time, detect missing quotes, unclosed brackets, trailing commas, and inspect payload schemas.

Escape special HTML characters (&, <, >, ", ') into HTML entities to prevent XSS attacks and rendering issues.

Convert JSON object arrays and nested data payloads into clean tabular Comma-Separated Values (CSV).