Color Blindness Simulator
See how any image looks to people with 8 types of color-vision deficiency — protanopia (red-blind), deuteranopia (green-blind, most common), tritanopia (blue-blind), achromatopsia (total color blindness), plus weak variants. Uses SVG color-matrix filters.
What powers the Color Blindness Simulator
8 simulation types: protanopia, deuteranopia, tritanopia, achromatopsia, plus -anomaly weak variants
Side-by-side grid (normal + 7 deficiencies)
Population percentage shown per type
Uses SVG color-matrix filters (instant)
Why the Color Blindness Simulator is different
Browser-native
The Color Blindness Simulator runs entirely in your browser. Input is processed locally — never uploaded, never logged, never cached anywhere outside your device.
No artificial limits
No daily quotas, no character ceilings, no "upgrade for more" walls. Every feature is the complete feature — the same on the first use as the thousandth.
Production-grade quality
Built to the same engineering bar as paid SaaS tools — accurate algorithms, audited logic, responsive design and accessibility-tested interactions.
Common use contexts
- UI / dashboard accessibility QA
- Data visualization color choice
- Brand color palette accessibility check
- Game design (especially status indicators)
Private and secure
Zero upload
All processing happens in your browser. Input is never transmitted, logged or cached.
Works offline
Once the page loads, the tool runs without an internet connection. No network calls happen during use.
No tracking
No accounts, no cookies for tool state. Only aggregate analytics count visits at the page level.