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JavaScript Minifier

Minify JavaScript code to reduce file size and improve load times

Remove console.logMangle namesCompressKeep class / function names

Input JavaScript

Smart minifier: full parse with variable mangling, expression compression, and dead-code elimination for maximum size reduction. Requires syntactically valid JavaScript.

Minified Output

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What is JavaScript Minifier?

Free online javascript minifier to minify your JavaScript code and reduce file size for faster website loading.

The tool removes whitespace, comments, and unnecessary characters while preserving functionality, then shows the original and minified sizes with a percentage reduction report. Paste a script and compress it in the browser, no build tool or npm setup needed. Ideal for shrinking a one-off snippet, minifying inline JS for an email or landing page, or trimming a production bundle when you just want a quick result. Works as a drop-in alternative when you need to minify JS online without installing anything. All processing runs client-side, so your code never leaves your browser. No signup required.

How to Use JavaScript Minifier

1Paste your JavaScript code into the input area
2Click 'Minify' to compress the code
3Review the minified output and file size reduction stats
4Copy the minified code for your production build

Frequently Asked Questions

JavaScript minification removes unnecessary characters from code - whitespace, line breaks, comments, and shortens variable names where possible - without changing functionality. This reduces file size, leading to faster page loads and lower bandwidth usage.

Basic minification (removing whitespace and comments) is very safe and won't break your code. The tool preserves all functional code including strings, regex patterns, and template literals.

Typical savings range from 20% to 60% depending on coding style. Well-commented code with generous whitespace will see the greatest reductions. The tool shows exact before and after file sizes.

Minifying removes whitespace and comments to shrink the file while keeping the code readable enough to debug if needed. Obfuscation goes further by renaming variables and rewriting logic to make the code hard to understand. This tool minifies your code for size, it does not obfuscate it.

No. For a single file or snippet you can paste it here and get the minified result instantly without configuring a bundler or installing packages. A build tool is still the better choice when you want minification as part of an automated pipeline across many files.

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What is JavaScript Minifier?

Free online javascript minifier to minify your JavaScript code and reduce file size for faster website loading.

Frequently Asked Questions

Basic minification (removing whitespace and comments) is very safe and won't break your code. The tool preserves all functional code including strings, regex patterns, and template literals.

Typical savings range from 20% to 60% depending on coding style. Well-commented code with generous whitespace will see the greatest reductions. The tool shows exact before and after file sizes.