JPG to WebP Converter

Google measured lossy WebP at roughly 25 to 34 per cent smaller than JPEG at equivalent quality, and that is the figure the format is usually sold on. It holds for normal photographs, because WebP inherits the smarter intra-frame prediction of the VP8 codec. It does not hold for a JPG that was already compressed hard: re-encoding one of those can even produce a slightly larger file.

Yes, and it is worth understanding. Your JPG is decoded to raw pixels and re-encoded as WebP at quality 0.92, so the result carries both the original JPEG artifacts and a new generation of WebP ones. At 0.92 the second pass is hard to see, but always convert from the highest-quality source you have, never from a copy that has already been through several saves.

In browsers, yes: every current browser decodes WebP, Safari included since version 14 in 2020. Outside the browser it is patchier. Some desktop editors, older office suites and a fair number of upload forms still reject it, so keep the JPG originals when you need to hand files to someone else.

Yes, with no sign-up, no watermark and no file-size limit. The conversion runs on a canvas inside your browser, so your photos never leave your device. Note that this also strips EXIF data, so camera model and GPS coordinates do not travel into the WebP.