Crop an image, photo or picture to exact pixel dimensions by typing where the box goes. Out comes a file that is the box: the width and height you typed, with no resampling, so 1.0× is what the contract says.
The fields work in pixels, in percent of the picture, or in millimetres, centimetres and inches at a density you choose. They move with the box when you drag it, and the box moves when you type.
Need a different output size than the box? Crop and resize sets it and says how much it scales. A ratio first: crop to aspect ratio. To keep the original data, crop JPG copies JPEG blocks and crop PNG keeps every pixel exact.
What you can do here
Typed geometry
X, Y, width and height fields move the box and follow it as you drag, so the numbers are always the box.
Five units
Pixels, percent of the picture, and millimetres, centimetres or inches at a density you set (300 ppi unless a requirement sets one).
No resampling
The output is the crop's own pixels. The contract above Download says 1.0× and the file's size in KB.
Lossless for JPEGs
A JPEG can be cropped without re-encoding at all: turn on Lossless under Export and the edges snap to the 8 or 16 px block grid.
How to crop image by pixels
- 1Open the image
Drop a photo on the box or choose one. It is decoded in this tab.
- 2Type the rectangle
Under Position & size enter X and Y for the top-left corner and W and H for the size. Arrow keys move the box 1 px, Shift+arrows 10 px.
- 3Download the exact pixels
The contract shows crop and output as the same size, 1.0×. Download saves that file.
Questions about cropping
Is the file exactly the size I type?
Yes. With no output size set, the file is the crop's own pixels, so a 640 by 480 box saves a 640×480 file. The contract above Download says 1.0× when nothing is scaled; if you set a different output size under Export, it says by how much.
Can I crop in centimetres or millimetres?
Yes. Switch the units to mm, cm or in and the fields convert at the density shown, 300 ppi by default, or the density a selected requirement states. The file is still cut at whole pixels, and the line under the fields gives the pixel values.
What does the percent unit measure?
X and W are a share of the picture's width and Y and H a share of its height, so 50% wide is half the photo whatever its resolution.
Why did my numbers change when I typed them?
A locked ratio keeps the other side in step, and the box cannot leave the picture, so a width that would run past the edge is reduced to fit. Choose Free under the ratio chips to type both sides independently.
Can I crop a JPG without losing quality?
Yes. Turn on Lossless under Export and the compressed blocks inside the box are copied without re-encoding. The left and top edges snap to the JPEG's 8 or 16 px block grid; the right and bottom edges stay where you put them. The crop JPG page has the details.
Is there a keyboard way to place the box?
Focus the box and use the arrow keys to move it 1 pixel, Shift with an arrow for 10, and Alt with an arrow to resize from the bottom-right corner. Ctrl+Z undoes, and a run of nudges counts as one step.