JSON Minifier
Strip whitespace, indentation and line breaks from JSON to reduce its size.
How it works
JSON Beautifier
Paste messy or minified JSON and get clean, indented, readable output instantly. Errors are pinpointed by line and column, and your data never leaves your browser.
Paste or type to begin. Everything runs in your browser.
- 01
Paste JSON, drop a .json file onto the input, or load the sample.
- 02
Pick 2 spaces, 4 spaces or tabs. Sort keys alphabetically if you want a stable order.
- 03
Copy the formatted result or download it. Syntax errors show the line and column.
About this tool
What is a JSON beautifier?
A JSON beautifier, also called a JSON formatter or pretty printer, takes compact or unstructured JSON and reformats it with consistent indentation, line breaks and spacing. The data doesn't change; it just becomes much easier to read, navigate and debug.
It's useful whenever you're working with API responses, config files, logs or database exports. Because the formatter has to parse the JSON first, it also works as a quick JSON validator: if something's wrong, such as a trailing comma or a missing quote, you'll see exactly where.
Indent your way
2 spaces, 4 spaces or tabs to match your project's style.
Sort keys
Optionally sort object keys A–Z for stable diffs and easier comparison.
Built-in validation
Invalid JSON is reported with the line and column of the problem.
Private by design
Formatting runs locally, so API keys and customer data stay on your machine.
FAQ
Frequently asked questions
Can I use this to validate JSON?
Yes. The JSON is parsed before it's formatted, so any syntax error is reported along with where it occurs. If you see formatted output, your JSON is valid.
Does beautifying change my data?
No. Only whitespace changes. Keys, values and order stay the same unless you choose to sort keys.
Why is my JSON invalid?
Common causes are trailing commas, single quotes instead of double quotes, unquoted keys, comments, and values like undefined or NaN, none of which are allowed in standard JSON.
Are my files uploaded anywhere?
No. This tool runs entirely in your browser using JavaScript. Your files and text never leave your device, so it's safe for private or confidential work.
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