Color Blindness Simulator
Image ToolsPreview images as colorblind users see them
FreePrivateInstant
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History
All history →Color Blindness Simulator — at a glance
Preview images as colorblind users see them.
chart.png
Edit
chart as seen with deuteranopia
How to use it — step by step
Just your input — nothing to install or sign up for.
1
Open or add your file
Add your file or start from the controls on the page.
2
Adjust settings
Change the options and see the preview update.
3
Run it
Press the main button to create your result.
4
Download
Save the result to your phone or computer.
Pro tips
Small things that make the result better.
✦About 1 in 12 men has some color vision deficiency; red–green types are the most common.
✦Do not use color alone to show meaning — add labels or patterns.
Quick facts
Freeno signup, no limit
Instantresult in a moment
Privatenothing is uploaded
Any devicephone, tablet or PC
Frequently Asked Questions
Is this medically exact?+
It is a close simulation useful for design checks, not a medical test.
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.
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