CSS has been considered turing complete for a long time.
So this isn't a shocking revelation, but it is cool.
this post was submitted on 24 Feb 2026
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Programming
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They did WHAT?!?!
These are truly the end times!
This is probably way easier to do than making a CSS interpreter for x86 CPUs :P
Nice.
Now install Doom on it.
Abomination!
Chrome and JavaScript required.
Chromium yes, but JS?
x86CSS is a working CSS-only x86 CPU/emulator/computer. Yes, the Cascading Style Sheets CSS. No JavaScript required.
They used the JS to provide a stable clock that speeds up the processing, but they also implemented it in CSS only as a fallback, if you haven't enabled scripts
so not required