HTML / CSS / JS Minifier
Strip whitespace and comments to shrink front-end assets.
Files and text are processed locally in your browser. Tools that must reach the network say so explicitly.
About the HTML / CSS / JS Minifier
Shrink front-end code. The Toolcenter Minifier removes comments and needless whitespace from CSS, HTML and JavaScript and shows the original size, minified size and percentage saved. JavaScript minification is conservative — it never renames identifiers — so output stays safe to ship.
How to use it
- 1Choose CSS, HTML or JS.
- 2Paste your source code.
- 3Read the size and savings figures.
- 4Copy or download the minified file.
Key features
- CSS, HTML and JavaScript modes
- Comment and whitespace stripping
- Conservative JS minify (no identifier renaming)
- Before/after size and % saved
- Local processing, no upload
Frequently asked questions
Will minifying break my JavaScript?+
No. It only removes comments and collapses whitespace without renaming variables, so behaviour is unchanged.
How much smaller will my CSS get?+
Typically 20-50%, more when the file has lots of comments and indentation.
Is this a full build-tool minifier?+
It is a fast, safe minifier for quick wins. For maximum compression use a build tool like Terser or cssnano in your pipeline.
Is my code uploaded?+
No. Minification runs in the browser.
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