Categories are the broad strokes: the handful of subjects that everything here sits under, from web performance and front-end development through to the business of running a consultancy.
There are currently 8 categories on CSS Wizardry. If you want something more specific than that, the tags go a good deal deeper.
Hi there, I’m Harry Roberts. I am an award-winning Consultant Web Performance Engineer, designer, developer, writer, and speaker from the UK. I write, Tweet, speak, and share code about measuring and improving site-speed. You should hire me.
Fronteers Dark Mode: Dordrecht (Netherlands), October 2026
I help teams achieve class-leading web performance, providing consultancy, guidance, and hands-on expertise.
I specialise in tackling complex, large-scale projects where speed, scalability, and reliability are critical to success.