Certainly! Prototyping is a crucial step in web design, allowing you to create interactive models of your websites to test functionality and user experience. Here are some popular tools for web design prototyping:

1. **Figma:** Figma is a cloud-based design and prototyping tool that offers real-time collaboration, making it great for teams. It supports design, prototyping, and code generation in one platform.

2. **Adobe XD:** Adobe XD is a user-friendly tool that combines design and prototyping. It’s particularly suitable for designers who are already familiar with Adobe’s creative suite.

3. **Sketch:** Sketch is a macOS-exclusive design tool that’s widely used in the web design industry. While it focuses on design, it integrates with various prototyping plugins.

4. **InVision:** InVision is a popular prototyping tool that allows you to create interactive prototypes, share them with stakeholders, and gather feedback. It also integrates well with design tools like Sketch and Figma.

5. **Axure RP:** Axure RP is a powerful prototyping tool that offers advanced interactivity and dynamic content. It’s suitable for complex web applications and user experiences.

6. **Balsamiq:** Balsamiq is a wireframing and prototyping tool that emphasizes simplicity and quick sketching. It’s great for getting your initial ideas down on paper.

7. **Proto.io:** Proto.io is a web-based prototyping tool that focuses on creating interactive prototypes without the need for coding. It’s user-friendly and suitable for web and mobile app design.

8. **Marvel:** Marvel is a simple and intuitive tool for creating interactive prototypes. It’s suitable for both design and user testing.

9. **Webflow:** Webflow is a web design and development platform that includes a prototyping feature. It’s unique in that you can export the design as production-ready code.

10. **Adobe Spark:** Adobe Spark is a free online tool for creating simple web and mobile prototypes. It’s easy to use and suitable for beginners.

11. **Moqups:** Moqups is a user-friendly web-based prototyping tool that’s great for creating wireframes and interactive prototypes.

Each of these tools has its strengths and features, so your choice will depend on your specific needs, preferences, and the complexity of your web design project. Many of them offer free trials, so you can experiment with a few to see which one works best for you.