I'm a full-stack dev, and honestly a year ago I was skeptical of AI coding. Then I started using it for real and it changed how I work — it's genuinely great at backend logic, architecture, refactors. But I kept hitting the same wall on the frontend. I'd ask the AI for a tiny UI change — a bit more padding, tighter spacing — and it would rewrite 200 lines, restructure components, burn a pile of tokens, and the layout still wasn't quite right. UI tuning is iterative and visual. Describing it in words and waiting for a regen is the wrong loop. So the problem I wanted to solve: keep the AI for the thinking, but get a fast visual way to do the last-mile UI work — without giving up my real code. That's CrossUI Studio. Code and canvas stay in sync on the same AST. You tweak something on the canvas, you get a clean one-line diff in your actual source file. No export, no fork, no runtime lock-in — stop using it tomorrow and nothing breaks. The approach evolved a lot. The hardest part by far was the two-way sync — making the canvas write back to the AST surgically instead of re-emitting the whole file. That took months to get stable, and it's the thing I'm most proud of. Along the way it grew a dependency graph that survives crashes and deep layer drill-down, but the core idea stayed the same the whole time: your source code is the source of truth, the canvas is just another view of it. It's live with a guest mode (no account) if you want to try it. Would genuinely love feedback from this community 🙏

CrossUI Studio

The IDE for React - AI writes the logic, you tune the UI

The IDE for React - AI writes the logic, you tune the UI