Best uses
Small scripts, static sites, prototypes, frontend asset checks and learning about source-size reduction.
JavaScript Minifier
Minify JavaScript online by removing unnecessary comments, whitespace and line breaks while protecting strings and important JavaScript syntax.
Free JavaScript Minifier
Use this free JavaScript Minifier to make JavaScript source code more compact by removing unnecessary comments, whitespace and line breaks. The tool processes your code directly in your browser.
What is JavaScript Minification?
JavaScript minification reduces unnecessary characters in source code while preserving the code's intended syntax. Smaller JavaScript files can require fewer bytes to transfer to a browser.
How to Minify JavaScript
- Paste JavaScript into the input box.
- Select the cleanup options you want.
- Click Minify JavaScript.
- Review the generated code.
- Copy the minified JavaScript.
JavaScript Minifier Features
- Remove JavaScript comments
- Remove unnecessary whitespace
- Remove unnecessary line breaks
- Protect quoted strings
- Protect template literals
- Show original and minified size
- Show percentage saved
- Copy the result
- Works on desktop and mobile
- No account required
- Browser-based processing
Important:
This is a lightweight source-code minifier.
Always test important production JavaScript after
minification before deploying it to a live website.
Frequently Asked Questions
What does a JavaScript minifier do?
A JavaScript minifier removes unnecessary source characters such as comments, redundant whitespace and unnecessary line breaks while attempting to preserve JavaScript syntax.
Why minify JavaScript?
Minification can reduce the size of JavaScript source code, which may reduce the amount of data that needs to be transferred to visitors.
Does this tool execute my JavaScript?
No. The tool processes JavaScript as text and does not execute the supplied code.
Is this JavaScript Minifier free?
Yes. The tool is available as a free online developer tool.