We convert more than 20 million files (450 TB of data) every month.
We delete input files and all temporary files instantly after any file conversion.
We delete output files instantly when a user clicks 'X' in web panel or run delete() in API, otherwise, output files deleted after 24 hours.
We just can't store all the user files. We do journal some data like user IP, file input and output types, conversion time, conversion success/error flag. These logs kept for a long time.
Output files are bounded to your IP only. Only the user, who initiated the conversion, can get the result file.
All communications between your host, our front-end (or API host) and conversion hosts are performed via secure channels with HSTS enabled, which prevents data to be altered or diverted (further reading). You can also check our SSL configuration here.