Improve your store performance by deferring the loading of Javascript in the HTML document rendered, by placing all the scripts at the end of the document before the closing body tag.

  • Defer loading of javascript
  • Manually restrict scripts from deferring by using an attribute.
  • Restrict deferring by page url
  • Restrict deferring by controller action
  • and more...
CE 1.4.x - 1.9.x

Price: $29.00

Looking to buy the extension for Magento 2.x? click here.

The Defer JS extension allows you to defer loading of Javascript by placing the Javascript at the end of the HTML document before the closing body tag, improving your magento store performance.

Alternatively, for an even better performance, this extension along with the Minify HTML and Minfy JS / CSS extensions are available in a single package in the UI Optimization extension.

Features Included

  • Defer JavaScript
  • Exclude controller actions from deferring.
  • Exclude URL paths from deferring.
  • Disable certain scripts from deferring if necessary.
  • Designed to preserve HTML validation.


  • Free updates for 1 year.
  • Free support for 1 year. If you have any issues with the extension purchased please contact us using the contact form or live chat on our website.
  • Meets magento standard development practices. No core files will be over written.
  • 100% open source.
  • Maintains HTML Validity.
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