JavaScript Minifier
Shrink JavaScript safely. This minifier removes comments, blank lines and extra spaces while keeping strings, template literals, regular expressions and line breaks intact, so automatic semicolons still work.
How to minify JavaScript
- Paste your script into the box.
- Copy or download the minified file.
- Test it on your page before replacing the original.
Safe minify vs full minify
| Safe (this tool) | Full (build tools) |
|---|---|
| Removes comments and extra spaces | Also renames variables and removes dead code |
| Keeps line breaks | Puts everything on one line |
| Very low risk of breaking code | Bigger savings, needs a build step |
| Great for snippets and widgets | Best for full apps |
Page speed tip
The biggest JavaScript win is usually loading less of it: remove plugins you do not need, delay third-party scripts like chat widgets until after load, and avoid heavy sliders. On WordPress, LiteSpeed Cache can minify and delay JavaScript automatically.
Related tools
Minify styles with the CSS minifier and markup with the HTML minifier, format data with the JSON formatter, and check page size with the page weight budget calculator.
More free tools and guides
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Frequently Asked Questions
Is this JavaScript minifier free?
Yes. It is free with no sign-up, and your code stays in your browser.
Why does the output keep line breaks?
JavaScript sometimes relies on line breaks to end statements. Keeping them avoids breaking code that skips semicolons.
Does it rename variables?
No. It is a safe, light minifier. Use Terser or esbuild for variable renaming.
Can it handle regular expressions and template literals?
Yes. Strings, template literals and regex literals are detected and kept unchanged.