Free browser tools
See the world through other eyes
Pick a tool, drop in a photo or turn on your camera, and watch the world change. Nothing is uploaded — every pixel is processed in your browser.
Dog vision simulatorWhy your dog misses the red ball, and which toy colour actually works.Cat vision simulatorBlue-grey, brighter, and blurrier up close.Colour blindness simulatorProtanopia, deuteranopia and tritanopia, with a severity slider.Myopia simulatorDrag the dioptre slider and try to read the last line.Cataract & glaucoma simulatorYellowing, glare and a narrowing tunnel.
AnimalLens: Animal Vision
See through the eyes of 90 animals in real time, and pick the toy colour your dog can actually see — free on the App Store.