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User quotes:
Now I can answer all those silly questions. I am very badly color blind and so, obviously, the before and after images are identical. However, when someone now starts to bug me about 'what do you see' I can just tell them to pick a URL and give it a try. I am told that the results are dramatically different for certain images that involve the problem colors; I have to take that as assurance of the simulation's accuracy.
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Try Vischeck on Your Image Files


  • Vischeck accepts most common image formats. However, we recommend that you use PNG or JPEG format for uploading large images as these tend to transfer faster.
  • For PowerPoint slides, you can save all your slides as PNG images with "Save As..." and run Vischeck on each slide.
  • If you have many images to process, consider downloading Vischeck to run on your own computer.)
  • Uploading a large file may take a while - please be patient!

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