JavaScript Formatter & Minifier
Clean up your messy code for readability or compress it for production with our fast and easy-to-use online tool.
Format Code NowJavaScript Code Optimizer
Beautify for development, minify for production. The complete JS formatting solution.
JavaScript Beautifier & Minifier
Why Use Our Formatter?
Our tool uses industry-standard libraries to give you the best results for development and production.
Improve Readability
Turn unreadable, single-line code into a beautifully formatted and indented structure for easy debugging.
Boost Performance
Minify your code to significantly reduce file size, leading to faster website load times and better user experience.
Private & Secure
Your code is processed entirely in your browser. Nothing is ever uploaded to a server, ensuring total privacy.
How It Works
Formatting your code is a simple three-step process.
Paste Your Code
Copy your JavaScript code, whether it's messy or clean, into the input text area.
Choose an Action
Click 'Beautify' to make your code readable, or 'Minify' to compress it for production.
Copy the Result
Your newly formatted or minified code instantly appears, ready to be copied.
A Developer's Guide to Code Formatting
Learn the critical difference between beautified and minified code and why both are essential for a professional development workflow.
The Art of Beautification: Writing for Humans
Beautification (or "pretty-printing") is the process of taking valid code and adding formatting like indentation, consistent spacing, and line breaks to make it easy for humans to read. In development, code is a form of communication—not just with the computer, but with your future self and other developers on your team.
- Why Beautify? Readability is paramount during development. Well-formatted code helps you spot bugs, understand logic, and navigate complex functions with ease. It's the standard for any professional project.
- When to Beautify: You should always write and maintain your code in a beautified format. You would also use a beautifier to inspect minified code from a third-party library or to clean up code that has been poorly formatted.
The Science of Minification: Optimizing for Machines
Minification is an automated process of removing all non-essential characters from source code without changing its functionality. This includes removing whitespace, line breaks, comments, and even shortening variable names. The result is a compact, single line of code that is completely unreadable to humans but perfectly understandable by a JavaScript engine.
- Why Minify? The primary goal of minification is performance. Smaller file sizes mean faster downloads for your users, leading to quicker page loads, a better user experience, and even improved SEO rankings.
- When to Minify: Minification is one of the final steps you take before deploying your code to a production server. You develop with the beautified version and deploy the minified version.
The Complete Workflow
A professional developer uses both processes as part of their standard workflow:
- Develop: Write clean, well-commented, and beautified code in your development environment.
- Test: Ensure the beautified code works as expected.
- Build & Deploy: Use a tool (like our Minifier) to automatically create a minified version of your code. This is the version you upload to your server for users to download.
Our tool gives you the power to perform both of these essential tasks instantly, right in your browser. Whether you need to quickly inspect a minified script or prepare your own code for production, you have the right tool for the job.
Frequently Asked Questions
Find answers to common questions about our JavaScript Formatter.
This is a dual-function tool. It can 'beautify' messy or minified JavaScript to make it readable, and it can 'minify' clean JavaScript to reduce its file size for faster web performance.
Yes, our JavaScript Beautifier and Minifier is completely free to use for all your development and optimization needs.
No. All formatting and minification happen locally in your browser using powerful JavaScript libraries. Your code is never transmitted over the internet, ensuring 100% privacy and security.
Beautify adds whitespace (indentation, line breaks) to make code easy for humans to read and debug. Minify removes all unnecessary whitespace and shortens variable names to make the file as small as possible for computers to download quickly.
Simply paste your JavaScript code into the input area. Click 'Beautify' to make it readable, or click 'Minify' to compress it. You can then copy the result from the output box.
This tool uses the well-respected JS-Beautify library for formatting and the powerful Terser library for high-performance minification, giving you industry-standard results.
Ready to Optimize Your Code?
Clean, format, and compress your JavaScript for development and production. It's fast, free, and secure!
Format My Code Now