Fixit – File minification

This test determines if your page makes use of excessive whitespace. Whitespace in markup, CSS and JavaScript files tend to make them more readable. However the extra data adds significantly to transfer and processing times. Minification is the process of reducing whitespace in files to an absolute minimum. In many cases filesizes can drop by over 30% through minifcation, thus speeding up content delivery and processing.

Checking for minifcation

This test checks to see what percentage of whitespace compression can be achieved for HTML, CSS and JavaScript. If there is a 25% of more saving to be made then the test reports a FAIL.

If you receive a FAIL for this test, you should consider researching minification techniques and best practices.



This test is based on a W3C mobileOK best practice. See for more details.


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