Google Announces AI-Powered UI Design Tool 'Stitch' - Instantly Convert Ideas to Code with Gemini 2.5

Google officially announced “Stitch,” an AI-powered UI design tool, at its developer conference “Google I/O 2025” on May 20, 2025¹. Stitch is equipped with two AI models, Gemini 2.5 Pro and Gemini 2.5 Flash, and can instantly generate sophisticated user interface designs and corresponding HTML/CSS code from natural language descriptions and image inputs.

This innovative tool breaks down the walls that existed between design and development, dramatically reducing the time from idea to implementation. According to Google’s announcement, Stitch is positioned as part of a new development trend called “vibe coding,” which aims to make UI development accessible to more people by having AI models generate code from natural language descriptions².

AI Model Selection and Multimodal Input

Stitch’s greatest feature is the ability to choose between two different AI models based on user needs. Gemini 2.5 Pro provides comprehensive and detailed design solutions, making it suitable for generating more complex UI patterns and sophisticated layouts. On the other hand, Gemini 2.5 Flash prioritizes speed and efficiency, optimized for rapid prototyping and iterative design work¹.

The input methods are diverse and highly flexible. Users can describe the application they want to create in natural English, and can also include color palettes and user experience details. What’s even more impressive is that users can upload images such as whiteboard design sketches, screenshots of attractive UIs, or rough wireframes, and Stitch can analyze them to generate corresponding digital UIs¹.

Practical Features and Integration Options

Stitch goes beyond being just a design generation tool, offering practical features that can be integrated into actual development workflows. Generated designs can be exported directly to Figma, enabling smooth collaboration with designers. Additionally, the generated code is exposed for editing and refinement in IDEs, allowing developers to make fine adjustments¹.

Stitch also provides excellent features for design refinement. With image-input modification options, interactive chat functionality, theme selectors, and direct paste functionality to Figma, users can truly focus on their creative design and development needs. Recognizing that design is an iterative process, Stitch offers the ability to generate multiple interface variants, allowing experimentation with different layouts, components, and styles².

Future Development and Market Impact

Google is planning further feature expansions immediately after I/O 2025. A feature scheduled to be added soon will allow users to take screenshots of UI design areas they want to modify and make changes by adding annotations with the modifications². This is expected to make the design iteration process even more intuitive.

Looking at the competitive landscape, Stitch was released just weeks after Figma announced its AI-based interface generator “Make UI.” However, Stitch has an advantage in that it generates not only designs but also frontend code³. This difference serves as an important differentiating factor especially for users who want to streamline both design and development, such as SaaS product teams, freelance developers, and agile development teams.

Google Stitch represents a strategic expansion of Google’s AI-assisted development ecosystem. By bridging the gap between design ideation and code implementation, it addresses a crucial pain point in the development workflow. The tool’s dual AI model approach - offering both comprehensive design solutions with Gemini 2.5 Pro and rapid prototyping with Gemini 2.5 Flash - provides flexibility for different use cases.

While currently experimental and limited to English prompts, Stitch’s positioning as a complement rather than replacement for established design tools shows Google’s pragmatic approach to market entry. The ability to export to Figma and generate editable code makes it particularly valuable for teams seeking to accelerate their UI development process without abandoning their existing workflows. As development continues, Stitch could become an essential tool in the modern developer’s toolkit, especially for rapid prototyping and bridging the design-development divide.