The UI prototyping phase of the design process is crucial to get right. It’s about figuring out how your product will work, and ensuring everyone is aligned before moving into building.
[InVision](http://invisionapp.com/) is a web-based [prototyping tool](http://invisionapp.com/) that lets you paint an accurate and realistic picture that anyone can understand.
InVision lets you design in your tool of choice. It simply requires .jpg, .png or .gif files. Create them however you want. Take your static files and drop them right into InVision all at once. The bulk uploader makes adding files a snap. Then use the web GUI to draw Hotspots and link them up.
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Design anywhere. Bring it to life with [InVision](http://www.invisionapp.com/). 
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