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No. Open a tool, add your input and get the result.

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Where practical, tools run in your browser, so your files and text stay on your device. Each tool page explains how it handles your data.

Which devices and browsers work?

Any modern browser on a computer, phone or tablet, such as Chrome, Edge, Firefox or Safari.

Can I rely on the calculators for financial or health decisions?

They give estimates and screening figures only. Check important results with a qualified professional.

JavaScript Minifier

JavaScript Minifier Online Free

Our javascript minifier online free lets you shrink your code in seconds. Paste your script, press a button, and get a smaller version with comments, extra spaces and line breaks removed. There is nothing to install and no sign-up, and everything runs directly in your browser.

Free JS Minifier Online for Any Project

This free js minifier online works for website scripts, landing pages, widgets, plugins and blog themes. The output is plain JavaScript, so you can paste it into a script file, a Blogger theme, WordPress, or any HTML page. Before you minify, keep a copy of your original file so you can keep editing the readable version.

Minify JavaScript Online in a Few Steps

You can minify javascript online with this simple process:

Paste your JavaScript code into the input box.
Press Minify to compress the code.
Check the result and the size you saved.
Press Copy and paste the minified code into your project.
Test your page to confirm everything still works.

Here is a small example of what minification does:

/* before */
function greet(name) {
  // say hello
  console.log("Hello, " + name);
}
greet("World");

/* after */
function greet(name){console.log("Hello, "+name);}greet("World");

Compress JavaScript Online Free to Speed Up Your Site

When you compress javascript online free of charge, your files become smaller, so pages download faster and feel quicker on mobile connections. Faster pages can also help your Core Web Vitals scores and give visitors a better experience. If you also want to make your pages look better, create a smooth background with a gradient or build a matching set of colors with our Color Palette Generator.

Free JavaScript Minifying Tool for Developers and Site Owners

As a free javascript minifying tool, this page suits developers who want a quick build step and site owners who just want a lighter website. There is no account, no watermark and no daily limit. Need more helpers for your project? Try the Favicon Generator for a custom site icon, the QR Code Generator for links and flyers, the Random Password Generator for secure logins, or the UUID Generator for unique identifiers.

Tips for better results

Always keep the original, readable file and only publish the minified copy.
Make sure your code has no syntax errors before minifying it.
End your statements with semicolons to avoid problems after line breaks are removed.
Test your page after replacing the old script, especially forms and buttons.
Combine minification with browser caching and compression on your server for the best speed.

Frequently asked questions

Is this javascript minifier really free? Yes. It is free, requires no registration, and has no usage limits.

Is my code uploaded anywhere? No. Your script stays in your browser.

Will minifying change how my code works? It should not. Minification only removes characters that are not needed, but you should always test the result.

Can I use the minified code on any website? Yes. The output is standard JavaScript that works on any site or platform that lets you add custom scripts.