Free Color Blindness Simulator
Preview how a photo or design looks with protanopia, deuteranopia, or tritanopia color vision, directly in your browser.
Add a photo to simulate
Choose a JPG, PNG, or WebP image.
Maximum 30 MBHow to simulate color blindness
- Add a photo or screenshot.
- See it rendered side-by-side under three common types of color vision deficiency.
How this works
Your browser applies published color-transformation matrices for each type of dichromatic color vision directly to the image's pixels — no file is uploaded, and no server-side processing is involved.
Common use cases
- Check whether a design or chart is still legible for colorblind users
- Preview a photo as seen with different types of color vision deficiency
- Test a color palette for accessibility before finalizing it
Frequently asked questions
Is this color blindness simulator free?
Yes. It is completely free, with no signup and no limits.
Is my photo uploaded anywhere?
No. Everything happens entirely in your browser. Nothing is sent to Inqita or stored.
What types of color blindness does this simulate?
Protanopia (red-blind), deuteranopia (green-blind), and tritanopia (blue-blind) — the three most common forms of dichromatic color vision deficiency.
Is this simulation medically precise?
It uses well-established published simulation matrices and is a useful approximation for design review, not a substitute for testing with real colorblind users or a clinical tool.