Google Launches Upgraded Stitch AI Tool to Automate UI Code Generation

Google today launched an upgraded version of Stitch, its AI interface development tool. Stitch uses Gemini large language models to convert UI designs or text prompts into production-ready HTML, CSS, and Tailwind code.

The new release features an AI-native infinite canvas that displays multiple visual assets side-by-side. Developers can now generate up to five connected screens-like product catalog, checkout, and confirmation pages-and preview user flows with a single ‘Play’ button.

Refinements are made via natural language or voice: ‘emphasize the checkout button’ or ‘increase font size.’ A new AI agent enables optional integration with Google’s Antigravity coding tool for auto-generated design variants.

Stitch also exports UI specs to a natural-language DESIGN.md file for cross-tool consistency. The tool remains free via Google Labs.