Change image size by the numbers, not by guesswork
When you change image size for a website, a print shop or an upload form, the number you type is rarely the number every file ends up with. Pictures come in different shapes, so a box of 1920 by 1080 means something different for a portrait phone shot than for a wide landscape.
ImageScaler does that arithmetic up front. Enter a Width, a Height or both, and each row in the list changes to read like "4032 × 3024 → 1920 × 1440". Click a file and its detail pane spells out Now, Becomes, Weighs, Should weigh and Format for that one picture, with the old and new sizes drawn to scale against each other.
It opens set to a width of 1920 pixels with the height left on auto, which is a sensible screen size for most photos. Change it, press Resize, and the whole batch follows the same rule.
How to resize an image without stretching it
Stretching happens when a picture is forced into a box of a different shape. The Shape control gives you three ways to deal with a box, and the note under it explains each as you pick:
- Fit scales the whole picture until it sits inside the box, keeping its proportions. Leave one side empty and it follows the other.
- Fill covers the box completely and trims what hangs over, keeping the center. The detail pane tells you roughly what share of the picture survives the crop.
- Exact forces the picture to the box regardless of shape. Use it only when the source already has the right proportions.
Scale an image by percentage instead of pixels
Sometimes the target is relative: half size for a quick preview, a quarter for thumbnails. Tick Scale by a percentage instead and the width and height boxes give way to a slider from 5% to 400%, moving in steps of 5.
Never make a picture bigger than it started is on by default. With it on, a small picture in a Fit or percentage batch keeps its own size instead of turning soft from upscaling, and the header tells you how many files that applies to before you run.
Resize an image to 1920x1080 and other fixed sizes
For a wallpaper, a video frame or a slide, type 1920 and 1080 and choose Fill. Every picture comes out at exactly that size, filled edge to edge, whatever shape it started. For a site that asks for images no wider than a limit, type only the width and keep Fit.
Width and height each accept up to 30,000 pixels. If you choose Fill or Exact with one side missing, a warning appears before the run instead of a list of failed files after it.
