Steps
Choose a batch, set the longest edge, then tune quality and format. Compare original size, output size, and savings before download.
Parameters
The longest edge scales width and height proportionally. Quality mainly affects JPG, WebP, and AVIF; PNG changes mostly through dimensions and re-encoding.
Limits
HEIC support depends on browser decoding. Save unsupported files as JPG or PNG, or process a smaller batch.
Related guides
JPG vs PNG vs WebP vs AVIF: how to chooseChoose a format by photo content, transparency, performance, and compatibility.Image quality, resolution, and file sizeControl pixel dimensions, encoding quality, and final size in a repeatable order.Converting transparent PNG to JPG or WebPPrevent black backgrounds, halos, and brand-color changes.EXIF date, device, location, and copyright fieldsUnderstand common EXIF fields and decide what to retain, correct, or remove.Image publishing checklist for websites, social media, and ecommerceA practical workflow for appearance, format, size, metadata, and accessibility.