Privacy Policy
This policy explains which information is processed while you use LibraryCSS services and how we protect it.
Last updated: October 6, 2026
Information we process
- Your name, email address, and verification status when you create an account
- Your name, email address, and profile image shared by Google or GitHub when you sign in with those providers
- IP address, browser information, and session records for account security
- Effects you add to your library
- Page-view, copy, and search events for our own usage measurement; for this measurement a visitor identifier is irreversibly derived from IP and browser information without cookies and rotates daily
- Usage, ad-display, and consent information collected through cookies by Google Analytics and Google AdSense (detailed below)
- Favorites and theme preference stored only on your device
Purposes of processing
We process information to provide account services, maintain security, resolve errors, remember preferences, measure service performance, show the advertising that covers the site's costs, and meet legal obligations. The service is free and we do not collect payment information.
Advertising (Google AdSense)
LibraryCSS shows ads through Google AdSense to cover its costs. In this context:
- Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to this website or other websites.
- Google's use of advertising cookies enables it and its partners to serve ads to users based on their visit to this site and/or other sites on the Internet.
- You may opt out of personalized advertising by visiting Google Ads Settings (My Ad Center).
- You can also opt out of a third-party vendor's use of cookies for personalized advertising at aboutads.info, or at youronlinechoices.eu if you are in Europe.
If you opt out of personalization you may still see ads; they are then chosen from general signals such as the page's content rather than your browsing history. The Google partner-sites explanation describes how Google uses data from sites that use its services. See the cookie policy for the cookie types involved.
Traffic measurement (Google Analytics)
We use Google Analytics 4 to understand how the site is used. Google Analytics collects information such as pages visited, session duration, approximate location, and device type through cookies (_ga, _ga_*), with IP addresses anonymized. We only see this information as aggregate statistics. You can prevent Google Analytics from collecting data about you with the Google Analytics opt-out browser add-on.
Service providers
Limited information may be shared with providers for hosting, email, authentication, analytics, and advertising. Your data is not sold to third parties for marketing.
Retention and security
Data is retained only as long as necessary to provide the service, maintain security, resolve disputes, and meet legal obligations. We use access controls, encryption, and session-security measures to reduce unauthorized access, though no internet transmission can be guaranteed completely secure.
Your rights
Send requests to access, correct, delete, or object to processing of your data to iletisim@librarycss.com. Identity verification may be required depending on the request.
Children's privacy
The service is not intended to knowingly collect personal information from people under 18. Contact us if you believe such data has been processed.
Changes
We may update this policy as the service or applicable law changes. The current version and revision date are published on this page.