Upload a Barcode image and extract the data out of it.
Upload a QR code image and extract the data out of it.
Make sure your passwords are good enough.
Parse details from any URLs.
Generate a SHA-512 hash for any string input.
Check whether a website is using the new HTTP/2 protocol or not.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.