Open Source Design & Prototyping Software
Design & Prototyping tools provide environments for creating user interfaces, wireframes, and digital product mockups. These tools translate visual concepts into functional prototypes or source code to bridge the gap between design and development. This type of software serves designers and developers who need to build GUI elements and design systems. Self-hosting these apps ensures that design tokens, project assets, and interface iterations remain on private infrastructure. This approach prevents external service outages from blocking the production of visual assets and keeps intellectual property within a local network.
This page lists 10 open source tools in the Design & Prototyping category. The most popular are Open Design, Penpot and Onlook. Most use the Apache-2.0 or MIT license, and 5 offer an official Docker image.
Open Design
An agentic workspace for generating webHML prototypes, pitch decks, and motion graphics using local-first AI agentsL agents.
Penpot
Create digital product designs and prototypes using open standards and a code based approach for developers.
Onlook
Visually edit React applications in the browser and automatically write changes back to the source code.
Responsively App
A modified web browser that enables developers to preview websites across multiple device screens simultaneously.
Pencil
Create GUI prototypes, wireframes, and diagrams using a library of shapes and customizable design elements.
Open CoDesign
Convert text prompts into prototypes, slide decks, and marketing assets using a variety of AI models.
OpenPencil
A design editor for opening Figma files with AI assistance, real-time P2P collaboration, and a programmable CLI.
OpenPencil
A design editor for creating visual interfaces with AI integration and native Figma file support.
Quant-UX
Create interactive prototypes and conduct usability tests to gather data driven insights for user experience design.
Grida
A 2D graphics engine and canvas editor for designing web applications with integrated database and CMS.
Join our newsletter to get shiny new open source software delivered to your inbox. Unsubscribe anytime.