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JavaScript Minifier

Minify JavaScript and optionally preview generated source-map output.

What this tool does

JavaScript Minifier helps you minify JavaScript and optionally preview generated source-map output.

What you get

JavaScript Minifier produces a direct output in this page and keeps all processing on your device, with nothing uploaded to our servers.

Shipped

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

JavaScript input

Sample inputs

Loaded sample: Function + object

320 characters

Options

Preserve variable names

Generate source-map preview

Minified JavaScript

Minified JavaScript appears here.

function calculateSavings(n,t){const o=n*(t/100);return{grossAmount:n,netAmount:n-o,totalTax:o}}const invoice=calculateSavings(420,8.25);console.log(`Net amount: ${invoice.netAmount}`);

Input characters

320

Input bytes

320

Output characters

185

Output bytes

185

Size change

42.0%

Report a bug

If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.