The best alternatives to JPG.to are Sindre Sorhus, BZG, and AnyWebP. If these 3 options don't work for you, we've listed a few more alternatives below.
AnyWebP is an all-in-one online tool that allows you to convert WebP images to general JPG/PNG and ICO. Reversely, it also enables you to convert any other image formats back to WebP. Fast, free and you do not need to upload any images to the server.
Convert your PNG/JPEG or WEBP image to BIMI-friendly logo (SVG Tiny Portable/Secure (SVG P/S) format) BIMI allows to display that logo in user mailbox next to the message in supporting email clients (Gmail and some others)