Check Gzip/Brotli Compression

How does this test work?

This test will check whether your website (and ultimately the server your website is hosted on) has gzip or brotli enabled by connecting to your domain and requesting the necessary information. Next to that it will also give you some additional information, like the file size of the original version of the web page you test and how much you (may) benefit from using gzip compression.

What does gzip compression do?

Gzip compression compresses web files (mainly HTML, CSS, and JavaScript files) to a tinier version, sometimes up to 70%-80% smaller. This much smaller compressed version of a file is then sent to the browser of the user requesting it instead of the larger original file. The browser of the user will then automatically decompress the compressed file and serve the uncompressed original file.

How does enabling gzip / Brotli make my website faster?

Since a compressed file is much smaller in file size (bytes) compared to the original web file, the website will need less time to fully load.

How do I enable gzip?

Go here for a detailed guide explaining how to enable gzip and for more information about gzip in general.

What is Brotli?

Brotli is a new open source data compression method. In the majority of cases Brotli can compress files to a smaller size than gzip can, it is therefore generally a better compression method compared to gzip.

Should I use Brotli instead of gzip?

At the moment Brotli is supported by all major browsers but not all browsers support Brotli yet. If you want to use Brotli you can configure your server to automatically switch between gzip and Brotli depending on the browser your visitor is using.

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