Gemini 3 Professional Vibe Coding: Constructing a Screenshot-to-Code Agent

Lastly, Gemini 3 is right here, and it’s breaking the web. Individuals are posting about Gemini’s front-end capabilities. So, I made a decision to strive it. Now, think about if you happen to offered a screenshot and AI wrote all of the code to mock the UI within the picture? Such a stage of front-finish improvement by people requires precision and persistence. Builders usually spend hours translating static designs into responsive code. I needed to hurry up this course of with vibe coding on Gemini 3 Professional.

For this, I constructed an AI agent to automate the conversion of designs to code. This undertaking checks the capabilities of multimodal AI and vibe coding on Gemini 3 Professional. My objective was to create a screenshot-to-code software in simply two prompts.

Why I Selected Gemini 3 Professional

Google launched Gemini 3 Professional only a day after Grok 4.1, with each claiming vital upgrades. Google’s mannequin, nonetheless, leads the trade in reasoning and technical duties. It tops the WebDev Enviornment leaderboard for coding accuracy. I selected it for its particular strengths in vibe coding. This technique permits creators to concentrate on the “really feel” of an app whereas the AI handles syntax.

Gemini 3 Professional affords distinct benefits for this particular construct:

• Multimodal AI: The mannequin interprets pixels with developer-level perception. It understands structure hierarchy, padding, and element relationships higher than text-only fashions.
• Agentic Capabilities: It manages a multi-file structure. It tracks the state throughout completely different information with out shedding context.
• Context Window: The mannequin holds your entire codebase in its reminiscence. This prevents logic errors when updating particular parts.

The Blueprint: What We Are Constructing

I needed a strong prototyping software. The objective was to transform a static screenshot right into a dwell, editable React undertaking. For this, the AI agent wanted to construct these core options:

• One-click parsing: The consumer uploads a picture, and the system generates structured code.
• Reside Preview: The interface should present the code and the visible consequence side-by-side.
• Privateness: The app should course of knowledge within the browser. It mustn’t retailer pictures on a server.
• Export: Customers should be capable to obtain the ultimate undertaking as a ZIP file.

I acted because the product supervisor. Gemini 3 Professional acted because the senior engineer.

Arms-On: Constructing the Agent

I constructed this complicated utility in two steps. I relied on the mannequin to make architectural choices.

To begin with, head over to https://aistudio.google.com/apps.

Now choose your mannequin to Gemini 3 Professional.

Section 1: The “God Immediate”

Many builders write easy prompts. They ask for remoted parts like a navbar. I took a special method by feeding Gemini 3 Professional a whole Product Necessities Doc (PRD).

For this, I described the screenshot-to-code software intimately and listed the first customers, akin to designers and front-end engineers. I then outlined the safety necessities explicitly and instructed the AI agent, “Right here is the specification. Construct your entire utility.”

Don’t fear, I didn’t write it myself both. I took assist from ChatGPT and defined the entire app, then requested it to provide me a brief PRD.

First Immediate:

Screenshot→Code is a speedy prototyping software that converts a single app screenshot right into a dwell, editable UI and downloadable React+Tailwind undertaking. Customers add a PNG/JPG, the system analyzes the structure and parts, generates clear HTML/React code, and renders a trustworthy preview in a tool body. Customers can edit visually (textual content, pictures, shade, reposition) or edit supply code; adjustments sync instantly to the preview. Closing artifacts could be exported as an edited screenshot and a runnable code ZIP for native improvement.

Core capabilities

• One-click screenshot parsing → structured UI mannequin (parts + kinds).
• Auto-generated HTML (Tailwind CDN) for fast preview + full React+Tailwind undertaking for obtain.
• Two modifying modes: Visible (WYSIWYG) and Code (dwell editor). Edits sync each methods.
• Export: edited high-fidelity PNG and downloadable undertaking archive (ZIP).
• Light-weight, privacy-first defaults: work in browser by default; persistent cloud storage non-obligatory with specific consent.

Main customers

• Designers who need to extract UI into code.
• Frontend engineers accelerating element creation.
• Product groups making fast interactive prototypes.

Safety & privateness

Uploaded pictures stay in consumer session by default; specific opt-in required for server storage. PII warning and purge controls offered.

The End result:

Gemini 3 Professional generated the whole file construction. It created the principle utility logic and the preview window element. It chosen a contemporary tech stack together with React, Tailwind CSS, and Lucide React for icons. The AI agent appropriately applied the logic to modify between “Code” and “Visible” tabs.

Section 2: The “White Display screen” Incident

I used the next screenshot to check our app and put it inside “Add a Screenshot” within the app.

The primary iteration was spectacular however incomplete. I loaded the applying and uploaded a screenshot of the identical app, however the visible tab remained clean. It is a frequent problem with iframe rendering in dynamic apps. The code logic was sound, however the browser couldn’t execute it.

I didn’t repair this manually. I requested Gemini 3 Professional to diagnose the bug.

My Second Immediate:

“Why can’t I see something on the Visible tab and it’s white even after GeneratedComponent.tsx is generated. FIx it”

The Repair:

The mannequin recognized the lacking dependencies instantly. The iframe wanted particular knowledge presets to parse TypeScript.

Gemini 3 Professional up to date PreviewWindow.tsx with these fixes:

• It added knowledge presets for env, react, and typescript.
• It improved the code cleansing logic to strip export default statements.
• It added a worldwide error handler to catch script errors within the guardian window.
• It applied a fallback discovery mechanism.

This repair labored instantly. The screenshot-to-code software rendered the UI with out errors.

The Closing Polish: “Powered By Harsh Mishra”

The app was practical, however I needed a private contact. The unique output included a generic “Powered by Gemin 2.5 Flashi” badge. I needed to assert the work.

I instructed the AI agent to replace the textual content from the “Describe a change textual content area”. It modified the badge to show “Powered by Harsh Mishra” with a yellow lightning bolt icon.

The ultimate UI is skilled. It includes a darkish theme with excessive distinction. The add zone makes use of dashed borders and clear typography. The gradients match the trendy aesthetic I requested. This stage of element validates the ability of vibe coding on Gemini 3 Professional.

My Take: The Way forward for App Growth

Constructing this screenshot to code software shifted my perspective. A undertaking of this complexity often takes days. I accomplished it in minutes. Gemini 3 Professional features much less like a chatbot and extra like a companion whereas vibe coding.

Vibe coding adjustments the function of the developer. We now handle brokers quite than write syntax. You present the imaginative and prescient, and the multimodal AI executes the logic. This shift permits us to concentrate on consumer expertise and product worth.

Gemini 3 Professional proves that AI instruments deal with production-level complexity. It maintained context, mounted obscure bugs, and delivered a cultured UI.

You possibly can strive the Screenshot-to-Code app right here: https://ai.studio/apps/drive/1PfOYRLP-QAAepG128DvJIt18Vofbbrx2

Conclusion

I efficiently constructed a React utility utilizing Gemini 3 Professional in two prompts. The AI agent dealt with the structure, styling, and debugging. This undertaking demonstrates the effectivity of multimodal AI in real-world workflows. Instruments like this screenshot-to-code app are only the start. The barrier to entry for software program improvement is decreasing. Vibe coding permits anybody with a transparent concept to construct software program, whereas AI fashions like Gemini 3 Professional present the technical experience on demand.

The way forward for coding isn’t about typing lengthy code; it’s about directing clever brokers. Now, head over to AI Studio and construct your personal utility with no value.

Ceaselessly Requested Questions

Harsh Mishra is an AI/ML Engineer who spends extra time speaking to Massive Language Fashions than precise people. Keen about GenAI, NLP, and making machines smarter (in order that they don’t substitute him simply but). When not optimizing fashions, he’s most likely optimizing his espresso consumption. 🚀☕