Design, prototype, test.
All in one tool.
Transform your static designs into interactive prototypes.
Validate your ideas early and see them work on the real device.
Free 15 day full-featured trial.
No credit card required.
By signing up you agree to our Terms of Service.
Already have an account? Sign In.
Get your prototype working on any screen size
Proto.io makes it super simple to create new versions of your prototype for different devices.
What does it mean for you?
Hassle-free conversion of your prototypes for different device sizes. Simply duplicate your project, select your new device and Proto.io will adjust the font-sizes, border width, width, height, width position and height position of all your UI elements on canvas to respect the new device properties and Device-Pixel Ratio.
Introducing the new DPR Adaptive UI libraries.
When a UI element is dropped on the canvas, it will adapt itself to the project's selected device resolution and Device-Pixel Ratio (DPR).
Note: Older Proto.io projects are fully compatible with this new feature. However, you will be asked to auto-upgrade each project built with the previous UI libraries, the next time you will try to edit it.
Try Proto.io for free for 15 days. No credit card required.
Join over 400,000 people already using Proto.io
Proto.io is used by some of the best companies in the world
Help us spread the word