Privacy policy

ersinkosar.com is the personal site of Ersin Koşar. For any question, write to merhaba@ersinkosar.com.

Visit statistics. Google Analytics runs only if you allow it, collecting anonymous statistics about which pages are read. If you decline, no tracking cookie is ever set and you will not be asked again.

Contact form. If you write to me, your name, email address, message, and the request’s IP with approximate location (country/city) are stored. They are used only to reply to you — never shared, never used for marketing.

Signed-in students get a single session cookie (payload-token; up to 1 week). It is required for sign-in to work, cannot be read by JavaScript and is never used for tracking. Your theme choice (dark/light) and cookie decision live only in your own browser. The only third-party cookies are Google Analytics (_ga, _ga_*; up to 2 years), set only after consent.

My students can create an account here with the code I give them in class, and take quizzes. For these accounts only the following is stored: full name, username, classroom, password, and quiz answers with scores. No email, phone number, national ID or address is asked for.

Passwords are never stored in readable form — only an irreversible hash that even I cannot read. Only I can see answers and scores; no student can see another student’s answers or score.

This data is used solely for assessment in my classes and is never shared. As most students are under 18, a student or their parent/guardian may ask by email to see or delete the data at any time; the account and all answers are then deleted.

The site runs on Cloudflare; form entries are stored in a Cloudflare D1 database. Email is hosted at Hostinger. Analytics data is processed by Google (see Google’s privacy policy).

Under GDPR and Turkish KVKK you may access, correct or request deletion of your data — just send an email, and form entries are deleted on request.

You can change your decision at any time: