Use a boundary, not a forced square
A maximum width and height define a bounding box. They do not require every image to become a square. With a 1600 × 1600 limit, a 4000 × 3000 landscape image becomes 1600 × 1200; a 3000 × 4000 portrait becomes 1200 × 1600. Nothing is cropped or stretched.
Prepare a small batch first
Open Batch resize, select still JPG, PNG, or WebP files, and enter maximum dimensions. Leave upscaling off to keep smaller originals at their current pixel size. Process a few representative images first, inspect the output, then download the batch. The current queue accepts up to 12 files, 20 MB per file and 60 MB total input.
Check pixels and bytes separately
A smaller pixel count does not guarantee fewer bytes after changing formats or quality. Check both dimensions and downloaded file size. If you need an exact square, use crop or fit in Print prep: crop removes edges, while fit can leave borders. Keep the original images for later edits.
Current capabilities and limits
Use percentage for proportional scaling, longest edge for mixed portrait and landscape images, or maximum dimensions for a bounding box. A 1800 × 1200 image at 25% becomes 450 × 300. Enlargement stays off unless enabled.
Select Percentage, enter the scale and keep enlargement off for reductions. Both dimensions change together. For a maximum-dimensions resize, 0 leaves that side unconstrained.