Online JavaScript formatting tool - one-click beautification of JS code

This is a free online JavaScript formatter based on the open-source Prettier framework. It supports one-click beautification and indentation optimization, helping developers quickly organize their JS code structure for clearer, easier-to-read, and more maintainable code. Whether debugging, learning syntax, or collaborating with a team, this lightweight online tool effectively improves front-end development efficiency and is compatible with various JavaScript writing styles.

Creative Inspiration

In daily development and code sharing, JavaScript often becomes difficult to read due to compression, duplication, or multi-person collaboration. This tool was created to help developers quickly restore a clear structure and unified style, improving debugging and collaboration efficiency. Its goal is to reduce comprehension costs and enhance the development experience.

How to Use

1. Paste the JavaScript code into the input area or upload a file.

2. Click "One-click Format" to complete indentation and structure.

3. Supports direct copying or downloading of formatted code for local development or online debugging.

Application Scenarios

• Debugging compressed or obfuscated JavaScript files.

• Unifying coding styles for team collaboration improves maintainability.

• Demonstrating clear code structure during learning or teaching.

• Online tools replace IDEs for quick processing of scattered scripts.

  Keywords: Online JavaScript formatter, JS code beautifier, online JS formatter, beautify JavaScript code, front-end development efficiency tool.

How it works

The tool uses the Prettier engine for syntax parsing, identifying the logical structure of JavaScript through the AST (Abstract Syntax Tree), and then intelligently indenting and formatting. It supports modern syntax features (such as ES6, modules, and arrow functions), ensuring that the formatted results are both readable and compatible.

FQA

1. Does formatting change the code logic?

   No, formatting only adjusts indentation and formatting; it does not modify semantics or execution logic.

2. Does it support new ES6/ES202x features?

   Yes, it supports common syntax, including arrow functions, modules, async/await, and more.

3. Can it process minified JS lines?

   Yes, the tool will automatically break and indent the lines, restoring the code to a clean, structured form.

4. Is it suitable for integration with team development standards?

   Yes, it can be used as a quick helper tool. Teams can use it with tools like ESLint/Prettier to achieve a consistent style.

5. Is it safe to use online?

   The online tool does not store user code; processing is done only in the browser, making it suitable for quick and secure use.