Developed with AI assistance, openly. I use AI in the planning, writing and programming of HTML code FYI. For me, that is essential context for understanding how this project is made. Read the full disclosure.
HTML code FYI is for people who build their own websites and want to understand the code in front of them. A working example is a beginning. Knowing why it works is what helps when something goes wrong.
The focus is practical HTML, CSS and JavaScript, with approachable guides to debugging, accessibility, design and publishing. This is a growing, deliberately bounded collection rather than an exhaustive reference to every web technology.
My web journey
From hand-written pages in the 1990s to developing alongside AI in 2026.
Things I’ve built
Personal stories, photographic archives and experiments on the web.
The future of the web
A personal perspective on tools, independence and understanding.
Working with AI
How the project is made, and why checking still matters.
The person behind the project
I am Mario V.W.B.R. Obst. My experience connects website creation, visual communication and international digital communication. My professional background is presented on marioobst.com (new tab).
Questions or corrections: 42@html-code.fyi.