Convert text to binary and the other way for any string input.
Convert text to hexadecimal and the other way for any string input.
Convert text to decimal and the other way for any string input.
Convert text to octal and the other way for any string input.
Make sure your passwords are good enough.
Compress and optimize images for a smaller image size but still high quality.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Extract email addresses from any kind of text content.
Check if the URL is banned and marked as safe/unsafe by Google.
Get details of any file type, such as the mime type or last edit date.