JSON Formatter

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Format, validate, and beautify JSON with syntax highlighting.

Indent:

Input JSON

Output

Output will appear here

What is JSON Formatter?

A JSON Formatter is an online tool that takes raw or minified JSON text and rewrites it with proper indentation, line breaks, and syntax highlighting so it is easy to read and debug. It also validates the JSON structure and reports any syntax errors instantly.

How to use JSON Formatter

Paste your JSON

Copy your raw or minified JSON and paste it into the left input area. You can also type directly.

Choose indentation

Select 2 spaces, 4 spaces, or tab indentation using the controls at the top.

View the formatted output

The right panel instantly shows your JSON with colour-coded keys, strings, numbers, and booleans.

Sort keys or minify

Toggle "Sort Keys" to alphabetise all object keys, or click "Copy Minified" to get the compact one-line version.

Copy or download

Click Copy to copy the formatted JSON to your clipboard, or Download to save it as a .json file.

Who uses JSON Formatter?

API response debugging

Backend developers

Paste the raw response from an API call to instantly see the structure, spot missing fields, and verify data types.

Config file editing

DevOps engineers

Format and validate JSON configuration files for AWS, GitHub Actions, package.json, and other tools before deploying.

Data exploration

Data analysts

Inspect large JSON datasets exported from databases or analytics platforms to understand nesting and field names.

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FAQ

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.