Resize & Crop
Image Dimensions Explained: Pixels, Resolution, DPI and Aspect Ratio
What pixels, megapixels, resolution, DPI and aspect ratio actually mean, how many pixels you need for printing, and when to resize versus crop.
Resize Image
Set an exact pixel width and height, or scale by percent. Works with JPG, PNG and WebP, entirely in your browser. To cut part of the picture away instead, use Crop Image; to keep the dimensions but shrink the file, use Compress Image.
How to use Resize Image
- 1
Add an image
Drop in a JPG, PNG or WebP, or click the box to choose one from your device.
- 2
Choose the dimensions
Enter an exact pixel width and height, or scale the image by percent if you only need it proportionally smaller.
- 3
Resize and download
The image is redrawn at the new size and you download it straight away.
Resize images to exact pixel dimensions
Websites, marketplaces and application forms often specify an image size in pixels: 1200 x 630 for a social preview, 600 x 600 for a profile photo, 1920 pixels wide for a banner. This image resizer lets you type those numbers directly, or scale by percent when you only need the picture proportionally smaller, such as halving a large phone photo before you email it.
Shrinking an image is safe, because neighbouring pixels are combined and the result stays sharp. Enlarging is different: the extra pixels have to be invented, so a small image scaled up looks soft. Whenever you can, start from the largest original you have and resize down.
Resize, then crop or compress
Resizing keeps the whole picture and changes its dimensions. If the target has a different shape from your photo, for example a square from a landscape shot, forcing both numbers will stretch it. Cut it to the right shape with Crop Image first, then set the final size here.
Fewer pixels also means a smaller file, but resizing is not a precise way to hit a limit. When a form sets a strict KB or MB maximum, finish with Compress Image. Everything runs in your browser, so photos are never uploaded and there is no limit on how many you resize.
Common questions
What is the difference between resizing and compressing?
Resizing changes how many pixels the image has. Compressing keeps the pixel dimensions and reduces the file size instead. If you have an upload limit in KB or MB, you want Compress Image.
Can I resize a WebP file?
Yes. WebP works the same as JPG and PNG here, and the file comes back in the format you put in.
Will the image stretch if I enter both width and height?
It can, if the numbers do not match the original ratio. Set one dimension and scale the other proportionally when you want the picture to keep its shape.
Resize & Crop guides
Resize & Crop
How to Resize a Photo for a Passport or Visa Application
Prepare a passport or visa photo that passes online checks: the right shape, exact pixels and a file size in the allowed range, step by step…
Resize & Crop
How to Resize an Image Without Losing Quality
Why shrinking an image keeps it sharp but enlarging never does, and six rules for resizing photos without blur, stretching or wasted quality.