HTML, CSS & JS Minifier & Beautifier
Format or compress front-end code with Terser, csso, and js-beautify — locally in your browser.
Your files never leave your device
Output
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JS minify uses Terser; CSS uses csso. HTML minify strips comments and collapses whitespace between tags (lossy vs full parsers — fine for many snippets).
How It Works
Step 1
Pick a language
Choose JavaScript, CSS, or HTML — sample code loads for each.
Step 2
Beautify or minify
Beautify formats with indentation; minify removes whitespace and optimizes where supported.
Step 3
Copy output
Paste minified assets into your build or beautify messy snippets for review.
Frequently Asked Questions
Terser and csso are widely used minifiers but you should always test. HTML minify here is whitespace-focused and may change formatting-sensitive edge cases.
No. Libraries run entirely in your browser.