MyAITools
Minifier

JavaScript Minifier

JavaScript Minifier is a free online minifier that helps you minify JavaScript with Terser; compress, mangle and ship the smallest possible bundle. JavaScript Minifier uses 2 input fields, returns 4 output values, and runs in your browser on the device.

Key facts

Inputs
2 fields: JavaScript and Mangle identifiers
Outputs
4 values: Minified JS, Original size (chars), Minified size (chars), and Saved
Runtime
your browser on the device
Mode
Minifier
Privacy
Files and text stay in the browser session.
Cost
$0, no account required

How to use JavaScript Minifier

  1. 1

    Paste or fill in the input

    Enter your text or values into the input fields on the page.

  2. 2

    Run the utility

    Click Compute to run the utility in your browser and review the result.

  3. 3

    Copy the output

    Copy the output value you need from the result panel.

JavaScript Minifier details

First, enter JavaScript in JavaScript Minifier. Next, review Minified JS, Original size (chars), Minified size (chars), and Saved. Additionally, JavaScript Minifier uses 2 input fields and 4 output blocks so the result is easy to scan and copy.

Paste any JavaScript or ES module and get a compressed, single-line version powered by Terser. Compression eliminates dead code and shortens expressions; mangling renames local identifiers to single letters for maximum size reduction. You can turn mangling off if you need stack traces with readable names. Runs entirely in your browser; your source never leaves this page.

Common searches

  • javascript minifier
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  • minify javascript
  • minify js
  • compress javascript
  • js compressor

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Frequently asked

What is JavaScript Minifier?

JavaScript Minifier is a free online minifier that helps you minify JavaScript with Terser; compress, mangle and ship the smallest possible bundle. JavaScript Minifier uses 2 input fields, returns 4 output values, and runs in your browser on the device.

What inputs and outputs does JavaScript Minifier use?

JavaScript Minifier uses 2 input fields: JavaScript and Mangle identifiers. JavaScript Minifier returns 4 output values: Minified JS, Original size (chars), Minified size (chars), and Saved.

Do my files and data stay private?

Yes. JavaScript Minifier runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.

How do I use JavaScript Minifier?

Open JavaScript Minifier, paste or fill in the input fields, and the result updates instantly. JavaScript Minifier runs in your browser with no upload and no waiting.

Which browsers does JavaScript Minifier support?

Any modern browser works in Chrome, Firefox, Safari, and Edge on desktop and mobile. JavaScript Minifier uses standard web APIs and does not require any plugin, extension, or sign-up.