What is it?
The Code Minifier removes spaces, comments and long names from JavaScript, CSS and HTML so pages load faster, and shows how many bytes you saved.
Who is it for?
Website owners and developers speeding up pages, Blogger theme editors shrinking custom CSS and JS, and students learning about page performance.
How to use it
- Pick JavaScript, CSS or HTML.
- Paste the code. Copy or download the minified version.
“Could not minify this code”
The code has a syntax error, such as a missing bracket or quote. Minifiers need valid code. The error message usually names the line; fix it and try again. Make sure you picked the right language.
My page broke after minifying
- JavaScript that relied on a missing semicolon at a line end can change meaning. Add semicolons and minify again.
- Inline
<script>in HTML that uses Blogger tags (<b:if>,data:) must not be minified as plain HTML. Minify only the CSS and JS parts. - Always keep the original, readable file. Edit the original, then minify again; never edit minified code.
Good to know
Minifying helps, but compression (gzip or Brotli, which most hosts do automatically) saves even more. Together they cut file sizes by 70–90%.
Example
A 40 KB CSS file often minifies to about 28–32 KB; served with gzip it may be under 8 KB.
Open the tool: Code Minifier (JS, CSS, HTML)
Still stuck?
Contact support. Tell us which tool or page you were using, what you tapped, what you saw, and your phone or computer and browser (for example: Android phone, Chrome). We reply by email.
Questions, or an error not listed here?
Tell us in the comments: what you were doing, the exact message you saw, and your device and browser. We read every comment and add new fixes to this article.