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JavaScript Minifier

Minify JavaScript and optionally preview generated source-map output.

Shipped

Browser local

JavaScript input

Paste, type, or load a sample. Everything runs in your browser.

Sample inputs

Loaded sample: Function + object

320 characters

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%

Options

Preserve variable names

Generate source-map preview

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.

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.