Image Resizer

Set the mode to Target file size and type 100. It encodes the image at a series of scales and keeps the largest one that still lands under your limit, which is what most upload forms actually care about. If even a tiny version misses the target it tells you the smallest it managed and at what dimensions, and switching the output to JPEG or WebP usually closes the gap.

2480 by 3508. Choose Print size, pick A4 from the paper list, leave the resolution on 300, and that is the figure it lands on. The list also carries A3, A5, A6, US Letter, US Legal, three photo sizes and a 3 inch square, and you can type any width and height in mm, cm or inches instead.

It stops the pixels being recomputed. The image keeps every pixel it arrived with, and only the printed size recorded in the file changes, which means the resolution moves instead. The same photo asked to print smaller comes out at a higher DPI. That is the setting you want when the detail is precious and the file just needs to declare the right physical size.

For one image it would be a button you press after every field. The new size and the print readout follow each keystroke, and the moment you finish a field the picture is encoded again, so Download always hands over what the stage shows. Load more than one file and a Resize all button does appear, because a batch is worth waiting for.

Four cards appear, each saying what it would do to your picture in its own numbers. Crop to fill covers your dimensions and trims the overflow. Fit inside pads the gap with the Border color, white by default. Stretch squashes the picture. Auto looks at how far off the two shapes are and crops when the difference is 15% or less, pads when it is more, and the note says which it chose.

Only when Allow upscaling is ticked. Leave it off and a width, height, percentage or box bigger than the picture keeps it at its own size, with a note saying so. Ticked, a plain resample grows it, though it invents no detail and the result softens. For a genuine enlargement, Enhance with AI first appears beside Download whenever the size you asked for is bigger than the picture.

JPEG is the default because most resizing is photos, and the Quality slider sits at 90, high enough that the difference is hard to see. PNG is lossless, which suits screenshots, line art and anything with transparency, though a photograph saved as PNG usually grows. WebP suits both. One catch worth knowing: PNG and JPEG carry the print resolution in the file, WebP has no field for it.

Select the lot, or drop a folder, and every file gets a row saying what it becomes, then Resize all applies the same mode and numbers to all of them. A file that will not decode is marked in its row while the others carry on. Once two or more are done, Download all (.zip) packs them into resized-images.zip, each named after its source with -resized on the end.

Depends which part you want kept. Resizing shrinks the whole frame and keeps everything in it, so a wide landscape squeezed into a square would have to be padded or squashed. If the point is to pick out a face from a bigger photo, the image cropper is the right stop, and you can resize the crop here afterwards.