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JSON Formatter

Format, validate, and beautify JSON with syntax highlighting and collapsible tree view. Minify to a single line for production. Catches syntax errors with line numbers.

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An API returned 3,000 characters of JSON on a single line. Somewhere in there is the field you need. Paste it here, and suddenly you have a collapsible tree view with indentation and line numbers. Also catches missing commas and trailing commas.

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How to Use This Tool

  1. Paste your raw or minified JSON data into the input field.
  2. Click 'Format' to beautify the JSON with proper indentation, or 'Minify' to compress it.
  3. View the formatted output with syntax highlighting in the result panel.
  4. Copy the formatted JSON to your clipboard or download it as a file.
  5. If your JSON is invalid, the tool will highlight the error so you can fix it.

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Frequently Asked Questions

What is JSON formatting?

JSON formatting (also called beautifying or pretty printing) is the process of converting minified or compact JSON into a human-readable structure with proper indentation and line breaks. This makes it much easier to read, debug, and understand complex JSON data.

Is this JSON formatter free to use?

Yes, this JSON formatter is completely free with no signup required. You can format, minify, and validate unlimited JSON data directly in your browser.

Does this tool validate my JSON?

Yes. When you paste JSON and click format, the tool will validate the syntax. If there are errors like missing commas, unclosed brackets, or invalid characters, it will alert you to the specific issue.

Is my JSON data sent to any server?

No. All JSON processing happens locally in your browser. Your data never leaves your device, making it safe to use with sensitive or private JSON data.

Can I paste minified JSON from an API response?

Absolutely. Paste any minified or messy JSON from API responses and it will be instantly formatted with proper indentation and syntax highlighting.