PRIVACY
Last updated: July 2026
The short version: OpticQuiz's tools — the Colorblind Corrector browser extension, the eye widget, the palette checker, the packages, and the API — do their work in your browser or on your own machine. They collect no personal data and require no account. Anything you set is stored only on your device.
The Colorblind Corrector extension
The OpticQuiz Colorblind Corrector browser extension:
- Collects no personal data. No analytics, no tracking, no identifiers, no account.
- Makes no network requests. The color correction is computed entirely on your device with an in-browser SVG filter. Nothing about the pages you visit, or the colors on them, is ever sent anywhere.
- Stores one thing, locally: your chosen correction mode, in your browser's own storage, so it persists between pages. It never leaves your device and you can clear it any time by removing the extension.
- Requests access to the pages you view for one reason only — to apply the color-correction filter to the page you are looking at. It does not read, store, or transmit page content.
The website (opticquiz.com)
Your vision-test answers and results are computed in your browser and never uploaded to us. The website itself uses standard third-party services on some pages, disclosed here for honesty:
- Google Analytics for aggregate traffic statistics, and Google AdSense for ads on informational pages (the home page, About, and guide articles) — never on the tests or the accessibility tools. These use cookies you can control in your browser or via Google's ad settings.
We do not sell your data, ever, and we do not build profiles of individuals.
Contact
Questions? Open an issue at github.com/zengineco/opticquiz.com. OpticQuiz is an independent, open-source project.