x86CSS
Hacker News
February 24, 2026
AI-Generated Deep Dive Summary
x86CSS is a groundbreaking project that demonstrates the execution of x86 machine code using only CSS, without any JavaScript or HTML required. This innovative creation showcases how CSS can be repurposed to simulate an 8086 CPU, running a C program compiled into native machine code. The project highlights the potential of CSS beyond its traditional role in styling and layout by leveraging animations and selectors to emulate processor behavior.
The creator achieved this by compiling C programs with GCC and translating each x86 instruction into corresponding CSS animations and styles. Each part of the CPU's registers, memory, and operations is represented through dynamic updates in the DOM using classes, IDs, and other CSS properties. While the project currently works only in Chromium-based browsers like Chrome or Edge, it pushes the boundaries of what can be accomplished with pure CSS.
This experiment underscores the playful yet powerful nature of web technologies. Although not practical for real-world applications, x86CSS inspires creativity and challenges conventional thinking about programming and hardware emulation. It also raises interesting questions about browser limitations and the future possibilities of interactive, visually engaging experiences using only CSS.
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Originally published on Hacker News on 2/24/2026