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LLMs now generate a lot of React and Tailwind UI code, but previewing it often means spinning up remote containers or using full sandboxes.

I just launched BuildKitty Play, a lightweight playground where you can write React + Tailwind, render it instantly, and inspect components in a React tree. It’s free, fast, and meant for quick experiments and AI-generated snippets.

You can try it here: https://www.buildkitty.com/play


This browser playground lets you create glowing particle trails that flow and fade like brushstrokes of pure neon light.

Built with Rust compiled to WebAssembly for performance, using WebGL for hardware-accelerated rendering. The particle system handles real-time physics simulation while maintaining smooth 60fps in the browser.


I just fixed it, if you want to give another try :)


Thanks for the feedback, I just fixed that and addressed your comments, feel free to try again :)


Yes, works much better now!


Hey HN,

I’ve been working on a visual application architecture diagram tool that helps me reason about logic and data flow more effectively. It’s essentially an interactive flow diagram interface where you can drag-and-drop nodes (like API, data, logic, etc.), connect them visually, and see how your app’s pieces relate to each other. I’ve found it incredibly useful for planning features and clarifying complex relationships in my own projects.

Now, I’d love your feedback:

Does this sort of visual approach help you clarify your application logic? Do you see potential in integrating it into your workflow? Any features or improvements you’d like to see? Check it out if you’re curious, and let me know what you think! Your insights would be a huge help as I continue refining it. Thanks in advance!


Hi HN, I built MailMonkey-AI for email newsletters using AI, inspired by tools like v0.dev. Check it out here: https://www.mailmonkey.ai/

Is this tech making design more accessible, or just shortcutting creativity? Thoughts?


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