Stitch AI, from Google Labs and powered by Gemini 2.5 (Pro and Flash), is a new generative AI tool unveiled at Google I/O 2025. It transforms simple text prompts or image/wireframe inputs into polished UI designs and production-ready front-end code (HTML/CSS), with seamless export to Figma. Designed to bridge design and development, Stitch is currently free to use as an experimental Google Labs tool.

Key Features

  1. Natural Language UI Generation
    Describe your interface in plain English—colors, layout, components—and Stitch AI will generate a responsive UI prototype.

  2. Image-to-UI Conversion
    Upload sketches, wireframes, or screenshots; Stitch AI interprets them and recreates the design digitally.

  3. Multiple Variants per Prompt
    Generate several design options from the same input to explore different layouts and styles.

  4. Frontend Code Export
    Outputs clean HTML/CSS (and in some previews Tailwind/JSX), ready for immediate development or further editing.

  5. Figma Integration
    Export your prototype into Figma as editable layers with proper Auto Layout and structure.

  6. Theme & Style Customization
    Adjust themes, color schemes, fonts, and component styles via conversational UI prompts.

  7. Powered by Gemini AI
    Utilizes Gemini 2.5 Flash for fast draft generation and Gemini 2.5 Pro for high-fidelity, multimodal understanding.

  8. Chat-Based Refinement
    Iteratively refine your design through a chat-like interface, making incremental adjustments easy.

Pros

  1. Rapid Prototyping
    Spin up interface mockups in minutes, accelerating the design-to-code workflow.

  2. Democratizes UI Design
    Non-designers and developers can produce polished prototypes with only natural language inputs.

  3. Editable Figma Outputs
    Prototypes import into Figma cleanly, preserving layers and Auto Layout for further refinement.

  4. Multiple Concepts
    Generate and compare different design variations effortlessly from a single prompt.

  5. Seamless Code Generation
    Delivers functional HTML/CSS (and Tailwind/JSX) for developers to jumpstart implementation.

  6. Multimodal Inputs
    Supports both text and image inputs for richer design guidance.

  7. Free Experimental Tool
    Accessible at no cost during its Google Labs beta phase.

Cons

  1. Early-Stage Artifacts
    Outputs can sometimes feel generic or lack detailed brand fidelity, requiring manual polishing.

  2. Single-Screen Focus
    Generating multi-page or multi-state flows remains unreliable.

  3. Beta Instabilities
    Occasional export glitches or chat timeouts reported by early users.

  4. Iteration Latency
    Generation can take 1–2 minutes—fast for prototyping but slower than real-time tools.

  5. English-Only Prompts
    Currently optimized for English; other languages may yield inconsistent results.

  6. Not a Full-Featured UI Editor
    Designed for rapid drafts rather than pixel-perfect final designs; significant refinement in Figma is often needed.

  7. Experimental Feature Set
    Some advanced controls (animations, complex interactions) are not yet supported.

Summary

Stitch AI is a visionary step toward unifying design and development through generative AI. It excels at rapid prototyping, code export, and Figma integration—all from simple prompts or sketches. As an experimental Google Labs tool, expect impressive drafts tempered by the need for manual refinement and multi-screen design workarounds. For teams aiming to accelerate early-stage UI exploration, Stitch AI offers a compelling and free solution.