Wireframing tools are commonly used by many designers, developers and project managers to visualize application flow and sitemaps. While it is hard for a team or clients to understand the written description of the look and feel of the website or application,wireframing tools make it easy for the team and the clients to imagine what the structure of the website or application should look like.

The prototyping process should be fast and does not take away much time from the project, because it can be edited and modified many times until reaching the final project structure. Therefore, many designers and developers look for free wireframing tools and online mockup tools to be able to create a project wireframe quickly and share it with the client or the rest of the team.

Here, you can find 15 free wireframing tools for visualizing ideas and project structures. Some of these tools are totally free, while others provide a trial or limited version of the paid one. You can review these wireframe tools and share with us your feedback and ideas. If you know other wireframe and mockup tools, share it with us in the comments below.