Colorblind Simulator Online — No Watermark on Output
Many free online tools add watermarks to your output — a logo, a URL, or "made with…" branding that ruins professional documents. FlexyPdf's Colorblind Simulator never adds watermarks to your files. Every output is clean, unmarked, and ready for professional use. Whether you are preparing documents for clients, creating content for your business, or working on school assignments, your results look exactly as you intended — without any third-party branding. This is not a limited trial feature; watermark-free output is always included at no cost.
How to Use Colorblind Simulator
Select Simulation Type
Choose from 7 color blindness types to simulate: Protanopia, Deuteranopia, Tritanopia, and more.
Upload Image
Upload an image to see how it appears to people with the selected color vision deficiency.
Compare & Download
Compare original and simulated images side by side. Download the simulated version.
Features
7 Simulation Types
Simulates Protanopia, Deuteranopia, Tritanopia, Protanomaly, Deuteranomaly, Tritanomaly, and Achromatopsia.
Side-by-Side View
Compare original and simulated images side by side for clear visualization.
Color Swatches
See how standard colors (red, green, blue, etc.) transform under each simulation.
Research-Based
Uses color transformation matrices based on Brettel, Vienot & Mollon (1997) research.
Benefits of Using Colorblind Simulator
Completely Free
Use Colorblind Simulator without any cost, limits, or hidden fees. No premium plans needed.
No Installation
Works directly in your browser. No software downloads or plugins required.
100% Private
Your files and data are processed locally. Nothing is uploaded to external servers.
Works Everywhere
Compatible with Chrome, Firefox, Safari, Edge on desktop, tablet, and mobile.
No Sign-Up
Start using the tool immediately. No account creation or email verification.
Always Available
Access this tool 24/7 from anywhere in the world, on any device.
Frequently Asked Questions
Complete Your Design Tools Workflow
These free tools work seamlessly with Colorblind Simulator to handle every step of your workflow.