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High-Fidelity UI Prototyper

Describe the interface you want and get back a high-fidelity HTML prototype you can open straight in the browser, animations included, built on 20 design principles. ## What it does - **Clickable prototypes:** a described screen or flow rendered as a working HTML page you can open in the browser - **High-fidelity UI:** layout, spacing, and type tuned against 20 built-in design principles, not a rough wireframe - **Animations:** transitions and micro-interactions included, so the prototype feels real - **Demo-ready output:** pages clean enough to drop into a pitch or a design review ## Where it fits - **A designer pitching a concept:** "Prototype the dashboard with a sidebar and three summary cards." A high-fidelity page to click through in the review. - **A founder prepping a demo:** "Mock up the signup flow end to end." A browser-ready prototype for the investor call. - **A PM validating an idea:** "Show me two layouts for this settings screen." Two polished options to compare. ## How it works 1. **Describe the interface:** a screen, a flow, or a full page. 2. **It applies the design system:** layout and interaction built on the 20 principles. 3. **You get HTML back:** open it in the browser, click through, and refine. Built for designers and product demos. Every prototype is a starting point for you to iterate on.

4.9 out of 5★★★★

37 ratings · showing the 12 most relevant

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Marcus T.

★★★★★· 8 days ago

Used this to build a high-fidelity prototype for our SaaS dashboard in about 2 hours. The HTML output was clean enough to hand directly to our dev team. Huge time saver vs. designing in Figma and having them rebuild from scratch.

PS

Priya S.

★★★★★· 24 days ago

Finally a tool that treats HTML as a real design medium, not an afterthought. Built an animated product explainer video with voiceover, exported it to MP4, and it looked polished enough for our landing page. The design philosophy guidance when I was stuck on direction was spot-on.

CW

Chen W.

★★★★· 1 month ago

Great for interactive prototypes and motion design. Built a mobile app mockup with working interactions—felt way more realistic than a static Figma file. One minor thing: the learning curve on the tweaks system took me a minute.

AM

Aisha M.

★★★★★· 1 month ago

Used it to create 3 design direction variants for a client pitch. The ability to swap between styles with tweaks and show them side-by-side was exactly what I needed. Client picked one in minutes instead of us guessing.

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James L.

★★★★★· 1 month ago

Good for animations and one-off prototypes, but the narration/TTS pipeline felt finicky when I tried to generate a 5-minute explainer. Video export quality was solid once I got it working though.

YN

Yuki N.

★★★★★· 2 months ago

Built presentation slides that actually animated smoothly instead of the usual boring PowerPoint transitions. Clients were impressed by how polished the motion felt. Way better than traditional deck tools for design work.

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Sofia G.

★★★★★· 2 months ago

Used for rapid iteration on an iOS app redesign. Playwright testing caught interactions I missed, and the device frame mockups looked professional in client presentations. Saved us from shipping a few UX issues.

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David K.

★★★★· 3 months ago

Solid for design exploration and mockups. The 20 design philosophies guide helped me articulate why one direction felt better than another. Wish there was more documentation on the more advanced features.

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Nina R.

★★★★★· 4 months ago

Created an animated product tour that exported beautifully to both HTML and MP4. The auto-ducking for voiceover audio was a lifesaver—didn't have to touch a DAW. Team loved the final result.

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Omar Z.

★★★★★· 5 months ago

For simple static prototypes it works fine, but I ran into performance issues when I tried to do a complex animation with lots of DOM elements. Might need optimization if you're pushing it hard.

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Lea C.

★★★★★· 6 months ago

Fantastic for creating hi-fi design comps that feel interactive, not just pretty pictures. Used it to demo a redesigned checkout flow to stakeholders—way more convincing than a Figma prototype because people could actually click through it.

RP

Ravi P.

★★★★· 8 months ago

Good tool for design variations and component exploration. Built three different UI treatments for a client and they could see the differences live. Takes a bit of setup time though compared to just opening Figma.