Duply
AI design system libraryLet AI code in any design style
Highlights
What you can do with it
- Build a web app in the style of a known design system
- Give a personal project a consistent look without a designer
- Prototype an internal tool using a reference design language
How to use it
- 1 Visit duply.ai.
- 2 Browse the 312 design systems and filter by style, industry, color, or font.
- 3 Copy the DESIGN.md file for the system you like.
- 4 Hand the file to your AI coding agent and let it build in that style.
- 5 Adjust or swap the design file during development if needed.
Who it is for
Pros
- Duply is free to use
- A large library of real design systems to reference
- Filtering by color, font, and industry speeds up the search
- Works with any AI coding agent that accepts a file
Limitations
- A design file gives direction, not a finished product
- Free access today can change as the platform evolves
- References are other companies' systems, not free assets to copy wholesale
- It covers visual language only, not backend logic or content
What Duply is
Duply is a design resource platform for AI coding. It takes real-world design systems, including ones from companies like Stripe, Linear, and Vercel, and decodes them into DESIGN.md files plus agent prompts you can copy. You hand that file to an AI coding agent, and the agent builds according to the visual language of that design system instead of guessing a generic style. The stated benefits are saving design time, keeping a consistent style, and lowering the difficulty of front-end work for teams without a dedicated designer. Duply is free to use, and the library can be filtered by style, industry, materials, colors, and fonts.
What you can do with it
- Browse 312 real-world design systems and copy their DESIGN.md files
- Filter by style, industry, materials, colors, and fonts
- Give a design file to an AI coding agent and build in that style
- Apply the same approach to web, desktop, or mobile projects
Who it is for
- Developers who want a consistent look without a designer
- Startup teams building a first product on a tight budget
- Design enthusiasts studying how known products are styled
What to watch out for
A design file gives the AI a direction, not a finished product. Expect to iterate, and check contrast, spacing, and accessibility in the result rather than trusting the first output. The library is a snapshot of other companies' systems, so treat them as references rather than assets you can copy wholesale into a commercial product. Duply is free to use now, and the terms around a free tool can change as the platform grows. It also covers visual language only, not backend logic, content, or performance, so the rest of the build is still yours.
FAQ
Is Duply free?
Yes, the product is described as free to use.
What is a DESIGN.md file?
It is a design system decoded into a readable file that you copy and hand to an AI coding agent so it builds in that visual language.
How many design systems are included?
The platform features 312 real-world design systems such as Stripe, Linear, and Vercel.
Why it is free
What the official page says： free to use
Free limits, trial length and features are decided by the official site and can change at any time.
Product preview
Screenshot archived from the listing page, for preview only.
