Kilian Valkhof

Building tools that make developers awesome.

Pixel with purpose podcast

Web, 25 April 2025

I recorded a podcast with the folks from Nordcraft on their new Pixels with Purpose podcast channel. We chatted about accessibility, education around that and of course about Polypane.

Advent Calendars

CSS & HTML, 6 January 2025

Happy new year! In December I was lucky enough to write articles for three different advent calendars: HTMHell, 12 days of web and the Fronteers Advent calendar.

An outline version of the new CSS logo

CSS & HTML, 20 November 2024

CSS got a new logo! After well over a decade of using the “CSS3” badge, there’s now a new CSS logo that fits nicely next to the JS, TS and friends logo’s.

How I automate electron-to-chromium updates

Electron, 26 August 2024

For the past 6 or so years I’ve been maintaining the electron-to-chromium package and I realise I never wrote a blog post about it. Electron-to-chromium is an NPM package that maps Electron versions to Chromium versions so you can input e.g. Electron 32 and get back Chrome 128.

ConTejas Code Podcast

Web, 21 August 2024

I’ve been a fan of Tejas’ podcast since he started it. He is an extremely gracious host that asks interesting questions and brings out the best in the people he has on. I was thrilled when he asked me to record an episode with him.

Polypane browser for responsive web development and design Hi, I'm Kilian. I make Polypane, the browser for responsive web development and design. If you're reading this site, that's probably interesting to you. Try it out!

I develop more software and tools:

Superposition

Use the design system you already have

FromScratch

A cross-platform, simple and smart autosaving scratchpad.

A Messenger Adventure!

Go on a text adventure in Facebook Messenger.

FixA11y

Browser extensions that automatically fix accessibility issues.

Trimage

Drag-and-drop lossless compression of PNG and JPG images for web.

Messenger Demo Viewer

Demo your (bot) interactions on Messenger.