Developer Tools
CSS Formatter
Make CSS source more readable with consistent indentation.
Use ToolJavaScript Formatter
Format JavaScript source without executing it.
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How to Use the JavaScript Formatter
- Paste JavaScript source.
- Run the formatter.
- Copy or download the formatted code.
Understanding Your Result
Formatting does not validate program behaviour or fix bugs. The pasted code is not executed.
Review the output before placing it in a document, publishing a file or using it in another application. Keep a copy of your original input so you can compare the result or try different settings. This interface is designed for a focused task: it does not replace a full editor, a professional assessment or the checks required by your destination service.
Working in Your Browser
The built-in JavaScript Formatter processes the data you enter in the current browser tab. Tool input is not submitted to a remote processing service. Clear the interface or close the tab when you finish, especially on a shared device. Downloaded files and copied text remain on your device until you remove them.
For another task, follow the related tool links below or return to all U18-CHAN tools. Related utilities can help you prepare an input or finish a result without installing extra software.
JavaScript Formatter Features
- Consistent indentation
- Local code formatting
- JavaScript file download
Frequently Asked Questions
How does JavaScript Formatter process my input?
The built-in interface processes your input in this browser tab. It does not upload the text or file to a processing server. Ordinary page visits and tool searches still request information from the website.
What should I check before using the JavaScript Formatter result?
Formatting does not validate program behaviour or fix bugs. The pasted code is not executed.
Is this JavaScript Formatter free to use?
Yes. This built-in tool does not require payment, registration or installed software. You need JavaScript and a supported modern browser.