Public IP via ipify — no key, no logging beyond their service.
See whether a site actually has a working favicon, and what format the icon really is.
Render your link the way a chat app or X will show it, and generate the meta tags to match.
Drag out a grid definition and get the CSS with media queries attached.
See how much mobile data streaming, gaming and video actually costs you per month.
Convert delimited text and JSON both ways.
Escape and unescape HTML and XML entities safely.
Decode a JWT header and payload, client-side only.
Compare two blocks of text line by line.
