Practical image tasks
Resize a picture without stretching it: calculate first, then crop or pad
Use a 2400×1600 example to compare proportional resizing with a fixed 16:9 canvas, padding, cropping and stretching.
You have a 2400 × 1600 photo and need an image 1200 pixels wide. Someone also enters 675 for the height, and the person in the photo looks oddly thin. The file did not merely get “compressed too much.” The original is 3:2; 1200 × 675 is 16:9. They are different shapes, so you have to decide what happens to the extra picture area.
Work out the proportional size
Enter width 2400 and height 1600 in the Image Aspect Ratio Calculator. Dividing both numbers by 800 gives 3:2. If you cut the width to 1200, the matching height is 800. That gives a 1200 × 800 result with no cropping or shape distortion.
If the recipient only asked for a maximum width of 1200, you can stop there. In Image Resizer, lock the aspect ratio and enter a width of 1200. The resulting height should be 800. Check the downloaded file's pixel dimensions; the scaled preview in a browser is not proof of the export size.
If the output must be exactly 1200 × 675
A 3:2 image cannot fill a 16:9 frame unchanged. You have three choices:
- Fit the whole image with padding. Every part stays visible, but blank space appears on two sides.
- Fill the frame by cropping. The image covers the frame, but part of the top and bottom of this example is cut away. A face or a line of text near an edge could disappear.
- Stretch to the exact numbers. Everything becomes wider or flatter. Avoid this for people, products, charts and text.
The image resizer offers fit, cover and stretch modes. Choose for the job rather than using a preset blindly. Cropping can make sense for a card thumbnail; padding is safer for evidence, tables or a design that must remain fully visible.
A quick check before delivery
Use an image with a round object or a person to spot distortion. A circle becoming an oval points to stretching. Missing words at the edge point to excessive cropping. Then verify the final pixels and decide separately whether file-size compression is needed.
The ratio calculator does the arithmetic; it does not edit the file. Use the resizer to export it. Enlarging a small original to a larger pixel count will not create detail that was never captured.