Nothing you type here is transmitted. Class lists are stored in your browser and nowhere else.
Names are stored in your browser's local storage on the computer you typed them on. They are not sent to this site, because this site has no server that receives them, and they are not shared with anyone.
That means no student data leaves your control by using these tools. It also means clearing your browser data, or a school wiping the profile, removes the list. Every tool offers a copy button so you can keep a copy.
Nothing here asks for the microphone or the camera. No tool on this site requests either permission, so there is nothing to record and nothing to switch off.
There is no advertising on this site and no analytics. No cookies are set for tracking, and no third party receives anything about your visit.
The host keeps ordinary access logs — IP address, browser, page requested — as any web server does, used for security and diagnosing faults. They contain nothing you typed.