Files processed in memory, never stored. Counts (pages, bytes) logged to conversions.log. If you type an email we keep it in the same log, used only to contact you about the paid tier and to email you a file if a conversion needs a queue. The page keeps a random id in your browser's localStorage so we can count how many people get from upload to download; it is not a cookie and is never linked to your name. No accounts, no third party analytics, nothing resold.