Reviewed practical guide
How to resize an image while preserving its proportions
Use common presets or custom dimensions and understand why a small source is not enlarged automatically.
Resize image accepts a width and height up to 12,000 pixels or presets such as 1080 × 1080, 1080 × 1350, 1920 × 1080 and 1200 × 630. The processor fits the image inside the requested box while preserving aspect ratio, without cropping or distortion.
The operation deliberately avoids enlarging a smaller source. This prevents invented detail and visibly soft results: when the requested box exceeds the original, its dimensions may remain unchanged. To fill a frame with a different aspect ratio, crop first.
What result to expect
You will receive a copy fitted to the new maximum dimensions in the source image’s common format.