About the Minifier (HTML/CSS/JS)
Minifier (HTML/CSS/JS) is a free browser-based developer tool from Convertify. Strip whitespace and comments from HTML, CSS or JavaScript to shrink file size for faster page loads. Everything runs instantly with no file upload, no account, and no usage limit.
Frequently Asked Questions
Does minifying change how my code runs?
No — whitespace, comments and (for JavaScript) variable names are compressed, but the actual logic and behavior stay identical. JavaScript minification specifically renames local variables to shorter names, which is always behavior-safe.
How much smaller will my file get?
It depends heavily on how much whitespace and how many comments your original file has — anywhere from 10% to 60%+ is typical. The before/after character count is shown after each run.
Will this break my code if it has a syntax error?
Yes — minification requires actually parsing your code first, so invalid HTML, CSS or JavaScript will show an error here instead of a minified result.
Should I minify CSS/JS that already gets minified by my build tool?
If your framework or bundler already minifies on build, you don't need this for that pipeline — this tool is most useful for one-off snippets, quick edits, or sites with no build step at all.
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