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JavaScript Formatter

Prettier under the hood: consistent quoting, semicolons and indentation for modern JavaScript including arrow functions, destructuring and async/await.

Private processing: this developer tool runs entirely in your browser — your files never leave your device.

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How to use JavaScript Formatter

  1. 1Upload or provide your input
  2. 2Adjust the available options to your needs
  3. 3Click the main action button
  4. 4Wait a moment while the tool processes
  5. 5Download or copy your result

Frequently asked questions

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From the blog

Guides and tips that feature this tool.

Image Guides

JPG vs PNG: Which Image Format Should You Use?

A plain-English comparison of JPG and PNG — when each format wins, why converting between them matters, and how to choose.