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JavaScript Formatter

Format and beautify JavaScript with clean indentation.

PDF & Document ToolsBrowser-only • PrivateFree

JavaScript Input

Formatted JS

Output will appear here...

Privacy First: All processing happens locally in your browser. Your data never leaves your device and is never uploaded to any server.

About JavaScript Formatter

The JavaScript Formatter beautifies minified or messy JS into clean, consistently indented code with readable spacing, so you can understand and debug it. It's perfect for un-minifying a bundle or tidying a snippet copied from the web. Formatting runs locally in your browser with nothing uploaded. To compress it for production, use the JavaScript Minifier, and format styles with the CSS Formatter.

How to Use

1Open JavaScript Formatter and paste or type your data into the input area.
2Adjust any available options to match the result you want.
3Your output is generated instantly — no button-clicking required for most tools.
4Use the Copy or Download button to save your result.

Common Use Cases

Previewing markdown and HTML before publishing
Formatting and minifying CSS, JavaScript, and HTML
Converting between markdown and HTML for docs and CMSs
Cleaning up code snippets for readability

Frequently Asked Questions

Can it un-minify JavaScript?

Yes. Paste minified or one-line JavaScript and the formatter expands it into properly indented, readable code, which makes debugging third-party or bundled scripts much easier.

Does formatting change behavior?

No. Only whitespace and indentation change. The logic, variable names, and behavior of the code remain exactly the same.

Is JavaScript Formatter free to use?

Yes. JavaScript Formatter is completely free with no sign-up, no subscription, and no usage limits. Every tool on CodeUtilityKit is free forever.

Is my data safe when I use JavaScript Formatter?

Absolutely. JavaScript Formatter runs entirely in your browser. Your input is processed locally with JavaScript and is never sent to, stored on, or logged by any server — so it is safe even for private or sensitive data.