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Web performance optimization tools

PurifyCSS is a website performance optimization tool that scans your HTML & JS source code, removes the unused CSS selectors and reduces the file size by up to 90%

Go to purifycss.online »

Currently working on a tool to generate critical CSS for the above-the-fold content of your webpage to speed up First Contentful Paint (FCP)

Read more here »

This is an experimental tool that finds and visualizes unused JavaScript on your website and helps reducing your total web page load time.

Go try the JS Coverage Tool »

Blog

Advanced image optimization techniques

Following my first blog article on the topic of image optimization, this blog post shall cover advanced image optimization techniques. I will present four methods, which will ultimately help improve your web performance by making your images more workable.  1. Image compression This subchapter will be started off with basic information on the common image … Advanced image optimization techniques Read More »

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Experiment: Why you should use “Cookie-Free” domain for static files and images

With this example I want to show how the usage of cookies can undermine effective image caching on websites. Even though the image filename remains the same, technically, there is a possibility to change the images depending on the cookies the browser has stored. With Apache, you can point a specific URL to be handled … Experiment: Why you should use “Cookie-Free” domain for static files and images Read More »

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How to optimize images for better web performance by using 3 easy ways

Work smart, not hard There are several tips and tricks on how to improve your images in order to reach a better web performance. This blog article will be the first part of a series of posts covering the topic of image optimization. It aims on presenting easy ways to catch the so-called ‘low hanging … How to optimize images for better web performance by using 3 easy ways Read More »

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How to use Next-Gen Image Formats WebP, JPEG 2000 and JPEG XR

One of the most underrated web performance optimization technique is delivering Next-Gen image formats. If you run a check in Google Lighthouse Report, you will probably get a recommendation that says “Serve images in next-gen formats” What is WebP, JPEG 2000 and JPEG XR and how do they differ WebP, JPEG 2000 and JPEG XR … How to use Next-Gen Image Formats WebP, JPEG 2000 and JPEG XR Read More »

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