Which crawlers actually turned up
A scan can tell you who your robots.txt allows. Only your own log can tell you who came. The gap between the two is where a firewall rule nobody remembers writing usually turns up.
Nothing leaves your browser
This page has no upload and no server to send to. An access log is a list of your visitors' IP addresses, and there is no version of this report worth making us a processor of them — so the parsing runs here, in this tab, and closing it is the whole of the cleanup.
▸ Where to find your log
nginx: /var/log/nginx/access.log · Apache: /var/log/apache2/access.log
The last few thousand lines are plenty. If you only want the crawler ones:grep -iE 'bot|gpt|claude|perplexity|crawler' /var/log/nginx/access.log | tail -2000
Combined format — what both servers write by default. Up to 50,000 lines at a time, which is a limit of this tab's memory rather than of the answer.