Convert a JPG to WebP to make it noticeably smaller at the same visible quality — WebP is the modern web format that keeps images sharp while cutting file size, which means faster pages and better scores. Set the quality and download.
Everything happens on your device, so your photo is never uploaded.
Usually yes — WebP typically produces a smaller file than JPG at the same visible quality, which speeds up page loads.
Yes, every modern browser displays WebP. For an app that cannot, convert it back to PNG or JPG.
No. The conversion runs in your browser.