Privacy Policy
The short version: there are no accounts, your results stay on your device, and we do not collect them.
Last updated Nov 7, 2026
No accounts
Stroop Test Lab does not have user accounts, logins or sign-up forms. You can use every test without giving us your name, email address or any other personal detail.
Where your results are stored
Test results and your preferred settings are saved in your own browser using a feature called localStorage. They stay on the device and browser you used.
Results are never sent to our server. We cannot see them, and we cannot recover them if they are deleted.
How to delete your results
Open the History page and use Clear history for any test, or delete single results. You can also clear site data in your browser settings, which removes everything this site stored.
Export and import
Exporting creates a CSV or JSON file directly in your browser and saves it to your device. Importing reads a file you choose and merges it into your browser storage. Neither action uploads anything to us.
Cookies
The site itself does not set cookies. localStorage is used only for the results and preferences described above.
Server logs
Like almost every website, our hosting provider keeps standard server logs. These can include your IP address, browser type, the pages requested and the time of the request. They are used for security and to keep the site running, and are kept by the host according to its own policies.
Third-party services
To load the page font, your browser contacts Google Fonts. Animation and PDF libraries are loaded from the jsDelivr and cdnjs networks. These requests reveal your IP address and browser details to those providers, as with any web request. They do not receive your test results.
Advertising in the future
The site does not currently show ads. If advertising is added later, advertising partners may use cookies or similar technologies. Before that happens, this policy will be updated and a consent banner will be shown where required.
Children
The tests are suitable for most ages, but children under 13 should use the site with a parent, guardian or teacher.
Changes to this policy
If this policy changes, the new version will be posted on this page with an updated date.
Contact
Questions about privacy can be sent to hello@example.com.