Charts and data series
Check whether lines, bars, and legend items still match without relying on hue alone.
Free local accessibility preview
Color Blindness Simulator for Images
Preview how an image may appear with protanopia, deuteranopia, or tritanopia. Compare the result with the original and download the simulated image.
Private by default. Your image stays on this device and is not uploaded.
Educational design aid. This simulator is not a medical diagnosis. Individual color perception varies.
Local workspace
Simulate color-vision differences
Upload once, move between modes, compare the image, and download the current result.
Simulation mode
A simulation of a green-cone dichromacy pattern.
Your comparison will appear here.
Choose an image to begin. The original is never permanently modified.
What to look for
Find meaning that disappears with color
A simulation is most useful when it leads to a concrete design change.
Error and success states
Make sure red and green states also use labels, icons, or distinct shapes.
Links and controls
Confirm links have more than a color difference and important buttons remain clear.
Maps and status tags
Add text, patterns, or symbols when regions and statuses become hard to tell apart.
Essential text
Check that labels and calls to action remain readable in every simulation.
How it works
A focused local review workflow
Compare first, identify the lost signal, then fix the design at its source.
- 01
Choose an image
Use a screenshot, chart, interface, illustration, or other supported image.
- 02
Compare simulation modes
Move through the tabs with a pointer or arrow keys and review each labeled result.
- 03
Download the result
Save the current PNG for design review, then fix any color-only communication.
Use the result responsibly
Color-vision simulation questions
Learn what the simulation can reveal, where it stops, and how to respond.
Ask another questionWhat does a color blindness simulator show?
It transforms image colors to approximate how some distinctions may change under a selected color-vision deficiency pattern. Use it to find information that becomes difficult to distinguish, not to predict one person’s exact perception.
What are protanopia, deuteranopia, and tritanopia?
They are forms of dichromacy associated with absent or non-functioning long-, medium-, or short-wavelength cone responses. Protanopia and deuteranopia affect many red-green distinctions; tritanopia affects some blue-yellow distinctions.
Is this a medical test?
No. This is an educational design aid based on a published simulation model. It does not diagnose color-vision deficiency, and individual color perception varies.
Is my image uploaded?
No. AdaptiveView decodes, transforms, previews, and exports the image locally in your browser. The original image and file name are not sent to a server.
How should I fix a design that relies on color alone?
Add labels, icons, patterns, shapes, or underlines so the meaning survives without the color difference. Then recheck contrast and test the revised image in every relevant simulation mode.