Change an image to the exact width and height you need: in pixels, as a percentage, or in centimetres and inches for printing. Proportions are kept unless you choose otherwise, and if you change the shape you decide whether the edges are cropped, borders are added or the image is stretched. The new file is measured before you download it.
How to use it
- Choose an image (JPG, PNG, WebP, AVIF, BMP or GIF).
- Pick how to resize: pixels, percentage, centimetres or inches.
- Enter the new width or height; with Keep proportions on, the other side follows.
- Select "Resize image", check the report, then download.
Options explained
Pixels, percentage, centimetres, inches
Pixels are what screens and most upload forms use. Centimetres and inches are converted to pixels at the DPI you enter, and the DPI is written into JPG files so they print at that size.
Keep proportions
On by default: change the width and the height follows, so nothing looks squashed. Turn it off to enter both sides yourself.
If the shape changes
Fill and crop the edges keeps the centre and trims what does not fit. Fit inside adds white (or transparent) borders. Stretch squashes the image to the new shape.
Format
Same as original keeps JPG, PNG and WebP. AVIF, BMP and GIF images become JPG, or PNG when they have transparent areas.
Example
- Input: A 4000 × 3000 px phone photo
- Settings: Pixels, width 1200, Keep proportions on
- Result: A 1200 × 900 px JPG, about a tenth of the original file size
Limits and troubleshooting
- Enlarging an image cannot add detail; the tool warns you when the result may look soft.
- The largest output is 50 megapixels, so browsers on phones do not run out of memory.
- Location and camera details (EXIF) are removed from the resized image.
- Animated GIFs become a single still image.
Questions
Will resizing reduce the file size?
Making an image smaller in pixels usually makes the file much smaller too. If you need a specific KB limit, use Compress Image, which finds the best quality under your limit.
How do I get a photo at 3.5 × 4.5 cm?
Choose Centimetres, turn off Keep proportions, enter 3.5 and 4.5, and set the DPI your form asks for (often 200 or 300). Fill and crop keeps the centre of your photo. For exam forms with a KB range as well, the Form Photo Resizer does all of it in one step.