Free Online Minifiers - CSS, JavaScript, HTML, SVG
Shrink your assets before shipping them. Each minifier reports the size saved and runs entirely client-side.
6 tools in this section
Minify CSS Online
Compress CSS code by removing whitespace, comments, and redundant rules. Free online CSS minifier with size comparison.
Minify JavaScript Online
Compress JavaScript code by removing whitespace and shortening variables. Free online JS minifier with size comparison.
Minify & Optimize SVG Online
Optimize SVG files by removing metadata, comments, and unnecessary attributes. Free online SVG minifier.
Minify CSS Online Free
Minify CSS online free to shrink file size and speed up your site. Strips whitespace and comments in your browser, no upload, no signup.
Minify SVG Online Free
Minify and clean SVG code online for free. Removes editor metadata, comments, and redundant attributes to reduce SVG file size, no upload.
Minify JS - Free JavaScript Minifier
Compress JavaScript by removing whitespace and comments. Free JS minifier with a size reduction report, no build tool needed.
Full Tool Pages
About These Tools
Every tool in this section is free and runs entirely in your browser on ToolBox. There are no uploads, no accounts, and no usage limits, so your files and data stay on your own device. Browse the full tool directory for everything else.