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Claude Prompt to Create Mockups

Creating mockups is a crucial step in any design process, whether for a mobile app, website, or software. Claude excels at generating detailed mockups in the form of ready-to-view HTML/CSS code, structured descriptions for design tools, or complete specifications to guide a development team. Thanks to its fine understanding of interface design, UX principles, and modern design systems, Claude can transform a simple idea into a concrete visual prototype in seconds. Whether you are a designer looking to speed up your ideation phase, a product manager wanting to communicate a product vision, or a developer wanting to quickly prototype a feature, Claude lets you go from intent to visual without mastering a complex design tool. The prompt approach gives you total control over the fidelity level, visual style, and complexity of the generated mockup.

The prompt

Claude

You are a senior UI/UX designer specialized in modern interface design. Create a detailed mockup for [DESCRIBE_SCREEN_OR_FEATURE] intended for [TYPE_OF_APPLICATION: WEB/MOBILE/DESKTOP].

Project context:

  • Industry: [EX: E-COMMERCE, SAAS, FINTECH]
  • Target audience: [EX: PROFESSIONALS 25-45 YEARS]
  • Visual tone: [EX: MINIMALIST, CORPORATE, PLAYFUL]

Generate the mockup as complete HTML and CSS code, ready to be opened in a browser. Follow these principles:

  1. Clear visual hierarchy with a consistent typographic system
  2. Spacing and alignment following an 8px grid
  3. Harmonious color palette with primary color [SPECIFY] and secondary [SPECIFY]
  4. Interactive components with visible hover/focus states
  5. Responsive design adapted to the target viewport

Include in the mockup:

  • Header with navigation
  • Hero section or main area
  • Relevant content elements (cards, forms, lists depending on context)
  • Footer
  • At least one visible call-to-action

Add comments in the code to explain design choices. Use realistic dummy data, not lorem ipsum.

Personalize this prompt with Léa

Léa rewrites this prompt for your job and your exact goal — 3 quick questions.

Why it works

This prompt works because it assigns an expert role to Claude, which activates its deep knowledge of UI/UX design. The structure in sections (context, principles, required elements) eliminates ambiguity and guides generation toward a complete and coherent result. The requirement for executable HTML/CSS code transforms an abstract description into a concrete and immediately usable deliverable.

Expected result

You will get a standalone HTML file containing a complete visual mockup with embedded CSS styles, ready to open in a browser. The result will include a structured layout with realistic UI components, a consistent color palette, and credible fictitious data that allows you to immediately evaluate the final rendering.

Variants by level

FAQ

Can Claude create mockups for mobile applications?
Yes, Claude can generate mobile mockups in HTML/CSS using adapted viewports (375px for iPhone, 390px for recent models). Specify the target dimensions in your prompt and request a container simulating a mobile screen. Claude can reproduce iOS conventions (navigation bar at the top, tab bar at the bottom) or Android (Material Design) according to your instructions. For optimal rendering, ask it to include a meta viewport and simulate the phone frame.
How to get a mockup faithful to my existing brand guidelines?
Provide Claude with the key elements of your brand guidelines: hexadecimal color codes, font names, font sizes, border-radius values, and spacing values. The more precise you are about your design tokens, the more accurate the result will be. You can also paste an excerpt from your CSS variables file or existing design system directly into the prompt for Claude to conform exactly.
Can we iterate on a mockup generated by Claude to improve it?
Absolutely, this is even the recommended method. After an initial generation, you can request targeted changes: rearrange a section, adjust colors, add a component, modify the visual hierarchy. Claude retains the conversation context and can apply incremental changes without regenerating the whole. This iterative approach allows you to gradually refine the mockup until you achieve the desired result, just as you would with a traditional design tool.

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How to use this prompt

  1. Copy the prompt with the button above.
  2. Paste it into ChatGPT, Claude or your favorite AI assistant.
  3. Replace the bracketed variables with your details, then refine the result.

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