Best Free Prototyping Tools in 2026

Figma is a cloud-based design platform for teams building digital products. It combines interface design, prototyping, design systems, and developer handoff in a single browser-based tool with real-time multiplayer collaboration. Designers, developers, and product managers work simultaneously on the same file without version conflicts. Figma supports vector editing, auto layout, component variants, interactive prototyping with animations, and a built-in developer mode that generates code snippets and redlines. Its plugin ecosystem and community file library extend functionality for wireframing, accessibility checks, and asset management. Acquired by Adobe in a deal that was later abandoned, Figma operates independently and serves teams from startups to enterprises like Microsoft, Airbnb, and Spotify.

Clayzo lets product and design teams prototype and review changes directly on their real codebase. Teams spin up instant sandboxes of their existing product, make visual edits, record walkthroughs, and leave element-level feedback tied to actual code. The feedback becomes actionable tasks that engineers and AI coding agents can build from directly, replacing the workflow of scattered screenshots, Loom videos, and Slack messages with contextual, code-linked reviews.

InVision is a digital product design platform for prototyping and collaboration. Turn static designs into clickable prototypes. Collaborate with comments and annotations. Design system management with DSM. Inspect mode delivers specs to developers. The prototype tool that brought design collaboration to teams.

UXPin is a design tool that merges design and development. Design with actual React, Storybook, or custom components instead of static mockups. Prototypes behave exactly like the final product. Developers get production-ready code, not just specs. Design system management keeps components consistent. Bridge the gap between design and code with a tool that speaks both languages.

Uizard is an AI tool that transforms hand-drawn wireframes or text prompts into functional digital prototypes. Perfect for entrepreneurs, product teams, and UX/UI designers who need to rapidly prototype and test ideas before full development. The AI automatically adapts designs for mobile and desktop, cutting design iteration cycles by over 50%.

Voiceflow is a no-code platform for building AI chat and voice agents through an intuitive drag-and-drop interface. Design, prototype, test, and deploy conversational experiences without engineering resources. Voiceflow supports multiple LLMs including advanced models and offers deep integrations with business tools. Teams can collaborate in real-time, share prototypes with stakeholders, and iterate quickly. The platform is popular with product teams, agencies, and enterprises building customer-facing AI experiences. Credits are consumed by agent actions and reset monthly.

UX Pilot is an AI-powered platform designed to accelerate and streamline the UX/UI design process for web applications. It enables users to ideate, design, and hand-off projects within a single environment, leveraging generative AI to produce high-fidelity wireframes and UI designs quickly and reliably. The platform aims to democratize exceptional design by making advanced UX and product design expertise accessible to UX professionals, product managers, and founders. This tool helps reduce the time and cost associated with traditional design workflows by minimizing handoffs, misalignment, and rework. It integrates seamlessly with various design systems and facilitates better communication across UX, product, and development teams. UX Pilot focuses on empowering users to create high-quality, user-centric digital experiences that drive business outcomes, offering features like AI-driven wireframe, UI, dashboard, and landing page generation, as well as website building and cloning capabilities.

Marvel is a design platform for creating wireframes, prototypes, and user tests. Design directly in the browser or import from Sketch. Add interactions to make prototypes feel like real apps. Share with stakeholders and collect feedback. User testing features gather insights from real users. No coding required. From first ideas to validated prototypes, Marvel helps teams design and test faster.

CodePen is a social development environment for front-end designers and developers. Write HTML, CSS, and JavaScript in the browser with instant preview. Share pens with the community or embed in documentation. Collections organize related experiments. Challenges and community inspire creativity. The playground where front-end developers experiment, learn, and show off their CSS wizardry.

MockFlow is an online wireframing and UI planning tool for designing websites and apps. Create wireframes quickly with drag-and-drop components and pre-built templates. Build sitemaps to plan your information architecture. Collaborate in real-time with team members. Export designs to PDF or share interactive previews. MockFlow's simple interface makes it easy to sketch ideas and iterate on designs without learning complex tools.

UltiMaker Cura is a powerful, open-source 3D printing slicing engine designed to guide users through their 3D printing process. It takes 3D models and prepares them for printing by generating toolpaths, allowing users to customize over 400 settings for granular control. The software is built through years of expert in-house development and user contributions, ensuring regular updates and expert-tested features. This software is ideal for anyone involved in 3D printing, from hobbyists to professionals in industries like education, manufacturing, automotive, aerospace, and product development. It aims to remove the guesswork from 3D printing, providing reliable results through intent profiles and recommended settings tested for thousands of hours. UltiMaker Cura seamlessly integrates with all UltiMaker products, enhancing the overall 3D printing workflow.

Moqups is an all-in-one online visual collaboration platform designed for teams to share ideas, map flows, and create mockups for UI/UX designs. It allows users to create professional wireframes for websites, apps, and dashboards directly in the browser, without any installation. The platform supports drag-and-drop functionality for easy-to-configure elements, enabling the creation of UI/UX mockups from low to high fidelity. Beyond wireframing, Moqups facilitates the creation of polished flowcharts, sitemaps, org charts, storyboards, user flows, mindmaps, and UML diagrams to bring clarity to complex ideas. Users can also build interactive prototypes by adding interactivity to wireframes and mockups, simulating user experiences for stakeholder presentations and approvals. The tool emphasizes real-time collaboration, allowing teams to brainstorm, plan, design, and give feedback together with live-editing and online whiteboards, making it suitable for both remote and co-located teams. It integrates with popular tools like Slack, Google Drive, and Dropbox, and offers a comprehensive library of stencils, icon sets, and styling options to accelerate the creative process.

Fluid UI is a rapid prototyping tool designed for designers, developers, product owners, and product visionaries to quickly create web and mobile prototypes. It enables users to communicate their product vision effectively by building interactive prototypes in minutes and sharing them instantly. The platform emphasizes speed, ease of use, and fun in the prototyping process. The tool offers a streamlined experience with over 2000 built-in components from popular design systems like Material Design, iOS, Windows, and Wireframe libraries. Users can also upload their own graphic assets and save them for future use. Fluid UI supports adding interactivity with various mouse and touch gestures, as well as beautiful page animations to bring prototypes to life. It also visualizes screenflows, showing how different pages relate to each other, and facilitates real-time collaboration among team members.

ProtoPie is an advanced interaction prototyping tool for realistic mobile prototypes. Create device-level interactions with sensors, voice, and camera. Multi-device prototypes show cross-platform experiences. No coding required for complex interactions. Test on real devices with ProtoPie Player. Prototypes so real, users forget they're not the actual product.

Justinmind is a prototyping tool for creating interactive wireframes and high-fidelity prototypes for web and mobile apps. Design without code using a drag-and-drop interface with pre-built UI libraries. Add interactions, animations, and conditional logic to make prototypes feel real. Test prototypes on actual devices. Features include design specs, assets export, and collaboration tools. Perfect for UX designers who need detailed, interactive prototypes.