WebSim

WebSim is an AI-powered platform that generates fully interactive websites, web applications, and simulations from natural language prompts. Often described as a 'hallucinated internet,' it uses large language models to produce complete HTML, CSS, and JavaScript code that renders as functional, clickable web experiences — no coding required.

The platform uses multiple AI models including Claude 3.5 Sonnet from Anthropic and GPT-4o from OpenAI, letting users choose their preferred model for generation. Users type a text prompt describing what they want — a landing page, a game, a data dashboard, an interactive tool — and WebSim generates a working version in seconds. The output includes navigation, buttons, forms, and responsive elements that behave like a real website.

A key feature is the iterative workflow: after initial generation, users can refine their creation through follow-up prompts, editing specific elements, adjusting layouts, modifying colors, and adding or removing components. The Multiverse Search feature lets users discover dynamically generated content related to their prompt, expanding the creative space. Sharing is built in — each creation gets a unique URL that can be shared, forked, and remixed by others.

WebSim has attracted a creative community building everything from games and interactive fiction to prototype landing pages and educational simulations. It is particularly useful for rapid prototyping, wireframing, and concept validation where speed matters more than production-grade code. The platform offers a free tier with limited runs and paid plans starting at around $5 per month for additional generation capacity.