The compatibility catch-all
Sooner or later every workflow hits a wall that only accepts JPG: a government portal, a job application form, an old CMS, a print shop, an e-mail gateway that strips modern formats. This page is the catch-all fix — feed it whatever image you have (PNG, WebP, GIF, BMP, or a JPG that needs re-encoding) and it hands back a standards-perfect JPG.
Because it accepts everything, it is also the page worth bookmarking: one URL that answers “make this file a JPG” regardless of what the file is.