How to resize multiple images at once
Drop up to 20 images, each up to 25 MB, or choose them from your device. Then pick a method. Percentage scales every image by the same amount, from 5 to 200 percent. Width sets every image to the width you type, including images narrower than that, which are enlarged. Each height is calculated from its own aspect ratio, so portrait and landscape photos keep their shapes.
Press Process and download ZIP. Each resized file keeps its name with -resize added, and the ZIP downloads when all of them are finished.
Percentage or width: which to choose?
Use percentage when your images are different sizes and you just want them all smaller, for example 50 percent to quarter the pixel count of a folder of camera photos. Use width when they need to match, such as product photos or blog images that should all be 1200 pixels wide.
Note that the width option sets every image to exactly that width. An image that is narrower than the number you type will be enlarged, so check that your smallest image is at least as wide as the target.
Formats and quality
JPG, PNG and WebP files stay in their own format. HEIC, TIFF, BMP and GIF files are saved as JPG, or PNG when they have transparency. JPG and WebP results are saved at 85 percent quality, which keeps photos clean while saving space. If a file can't be read, the rest still process and an errors.txt file in the ZIP explains what was skipped.
Good widths for a batch
For website galleries and blogs, 1200 to 1600 pixels wide is a common choice. For email attachments and sharing, 1600 to 2000 pixels keeps photos clear on any screen while cutting the file size. For thumbnails, 300 to 600 pixels is usually enough.