About HumanTestKit

HumanTestKit is a free collection of online tests that show how your senses and mind perform right now. You can measure your reaction time, see how many digits you can hold in memory, check your color vision, find the highest pitch you can still hear, or get a picture of your personality traits. Each page has an interactive test at the top and a plain-English guide below it that explains what the test measures, how to read your result and where its limits are.

Built to be repeated

Most results change with sleep, caffeine, practice and time of day. That is why every scored test remembers your personal best and your last results in your browser, so you can come back tomorrow and see whether you improved. The home page shows your personal bests at a glance.

Everything runs in your browser

Every test runs locally on your device. Your answers, scores and microphone audio are not sent to our servers. There are no accounts and nothing to install. You can read the details on our privacy page.

Honest about what an online test can do

These tests are for curiosity, practice and self-checks. They are not medical, psychological or educational assessments. A screen that is not calibrated, ordinary headphones or a slow mouse all affect results, and every guide says so. When we quote a typical value, we name the study it comes from, and we do not invent percentiles. If a result worries you, talk to a qualified professional such as an eye doctor, an audiologist or your GP.

Who is behind it

HumanTestKit is run by Murat Şahin, an independent developer based in Türkiye.

How the site is funded

HumanTestKit is free to use. We plan to cover hosting and development costs with advertising, which may be shown by third-party services such as Google AdSense. There are no ads right now. If we add them, we will keep them out of the tests themselves so they never interrupt a measurement.

Suggest a test

Is there a test you would like to see? Write to us through the contact page.