Cor Blindness Simulator

Color Blindness Simulator is a free, browser-based tool that lets you create designs instantly — without installing software, signing up, or uploading files to any server. Everything happens locally in your browser, so your data stays on your device.

This tool is built for everyday use: from quick one-off tasks to repeated workflows. It loads in milliseconds, works offline once cached, and runs equally well on desktop, tablet, and mobile. The interface is deliberately minimal so you can focus on the result rather than learning the tool.

Common use cases include: mocking up styles before committing them to a real css file; building a quick visual prototype for a designer or client; exporting reusable design tokens for your design system; teaching design concepts visually. Whether you're a student, a professional, or just need a quick utility, Color Blindness Simulator gets the job done in seconds.

Privacy is built in by design. Because all processing happens client-side in your browser, no analytics service, advertising network, or backend ever sees your input or output. You can verify this by checking your browser's network tab while using the tool — you'll see zero outbound requests for your data. That makes Color Blindness Simulator suitable for sensitive content (medical, legal, financial) where uploading to a third-party service would be a non-starter.

Color Blindness Simulator is part of ToolHub — a free, ad-free, open-access collection of 750+ in-browser utilities covering PDFs, images, text, calculators, developer tools, design, social media, education, business, health, and more.