— Smashing Magazine

Kilian Valkhof is a front-end developer with over 20 years of experience who switched from building websites to creating tools that make web development more effective and efficient. He is the founder and solo developer of Polypane, a desktop browser that helps web developers with responsive design, accessibility, and SEO testing. Kilian also created Superposition, a tool to extract design tokens from websites, and FixA11y, a browser extension that automatically fixes contrast issues. He regularly shares his insights as a writer and conference speaker. Thank you for everything you do for the community, dear Kilian!