Cropping my scanned lecture notes, but is pdfcroppers safe for uploads?

I have a 30-page PDF of scanned lecture notes with huge dark borders that I want to trim before printing, and I came across pdfcroppers. Since the notes have my student ID on them, can anyone confirm if that site is actually safe to upload personal files to?

had the same thing last month with some messy scans. tbh i wouldn’t upload anything with my student id on it to a random website. fwiw i just print them out and cut the borders with scissors if they bother me that much. keeps everything local and i don’t have to worry.