100% Free Client-Side Tool

Free Online Color Blindness Simulator — Protanopia & Deuteranopia

Simulate Protanopia, Deuteranopia, and Tritanopia view on images.

💡 Quick Answer

Toolhammer's Color Blindness Simulator is a free, client-side online browser tool that processes your files and data 100% locally. It requires zero server uploads, no software installation, and no account registration, offering instant speed and complete privacy.

✓ 100% Client-Side ✓ Zero File Uploads ✓ No Signup Required ✓ Updated July 2026
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Upload Image to Test Color Blindness Accessibility
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How to Use Color Blindness Simulator Online

  1. 1
    Select or paste input for Color Blindness Simulator

    Choose your file or paste your text directly into the secure browser input area.

  2. 2
    Configure processing options

    Adjust settings, formats, or preferences as needed for your task.

  3. 3
    Download or copy results

    Click process to instantly view, copy, or download your output file with 0ms latency.

Simulate Color Vision Deficiencies for Graphic Accessibility

Testing your designs for Protanopia (red-blindness), Deuteranopia (green-blindness), and Tritanopia (blue-blindness) ensures charts and UI buttons are recognizable to all users.

Frequently Asked Questions

Everything you need to know about using Color Blindness Simulator online.

What percentage of the population has color vision deficiency?
Approximately 8% of men and 0.5% of women worldwide have a form of color vision deficiency.