How to Simulate Color Blindness on Images Online
Designers and developers need to ensure their visual content is accessible to people with color vision deficiencies. Color blindness simulators help you see how images appear to individuals with different types of color blindness. This guide shows you how to simulate color blindness online using fixie.tools — a free tool that supports all common types of color vision deficiency with no signup required.
Step 1: Open the Color Blind Simulator
Navigate to fixie.tools/color-blind in your web browser. No account or registration is needed. The tool works on desktop, tablet, and mobile devices.
Step 2: Upload Your Image
Click the upload area or drag and drop an image file. Supported formats include JPG, PNG, and WebP with a maximum file size of 25MB. Choose images with color-coded information, charts, or design elements you want to test for accessibility.
Step 3: Select Color Blindness Type
Choose from common color vision deficiencies: Protanopia (red deficiency affecting ~1% of males), Deuteranopia (green deficiency affecting ~1% of males), Tritanopia (blue deficiency, rare), or Achromatopsia (complete color blindness, very rare). Each type simulates how the image appears to people with that specific condition.
Step 4: Review the Simulated Result
The tool displays your image with simulated color vision deficiency applied. Compare the original and simulated versions side-by-side to identify potential accessibility issues like indistinguishable color-coded elements or poor contrast.
Step 5: Download or Test Additional Types
Download the simulated image or test additional color blindness types to ensure your design is accessible to all users. Your images are automatically deleted from our servers after 24 hours for privacy.