Crop a photo, image or picture to an exact aspect ratio and see what the ratio costs before you save. Out comes a file whose width and height are in that ratio to the pixel, at the size you cropped unless you choose another.
Locking a ratio changes the box, not the photo: the pixels inside it are kept as they are, and the page states how many pixels across and down were left outside. Turn any ratio portrait with one press, and type a custom one when none of the fourteen fit.
The ratio is not the only exact thing here: crop by pixels takes typed positions in px or cm, crop for Instagram adds the platform sizes, and no crop fits the whole photo into a ratio instead of cutting it. For an exact output size, use crop and resize.
What you can do here
14 ratios, one tap each
Free, 1:1, 4:5, 3:4, 4:3, 5:4, 3:2, 2:1, 16:9, 9:16, 21:9, golden (1.618:1), A4 and any custom W:H you type.
Portrait or landscape with one press
The ⇄ button turns the locked ratio the other way round, so 3:2 becomes 2:3 without retyping anything.
The cost of the ratio, in pixels
Under the ratio chips the page says how many pixels across and down the box leaves out, and what share of the photo that is.
No resize unless you ask
Cropping to a ratio keeps the pixels inside the box. The output is the crop size until you set a size under Export.
How to crop to aspect ratio
- 1Open the photo
Drop it on the box above or choose it. It is decoded in this tab and nothing is sent anywhere.
- 2Choose the ratio and frame it
Tap a ratio under Position & size; tap ⇄ for portrait. Drag the box or its handles; the ratio holds while you do.
- 3Check the contract, then download
The line above Download states the crop and output pixels, the format and the size in KB. Download saves exactly that.
Questions about cropping
Which aspect ratios can I crop to?
Free, 1:1, 4:5, 3:4, 4:3, 5:4, 3:2, 2:1, 16:9, 9:16, 21:9, the golden ratio (1.618 to 1), A4 (210:297) and any custom ratio you type as two numbers. The short row on a phone holds the common ones; the full set is under Position & size.
How do I make a ratio portrait instead of landscape?
Press the ⇄ button next to the ratio chips. It turns whichever ratio is locked the other way round, so 16:9 becomes 9:16 and 3:2 becomes 2:3, and the box is refitted around its centre.
How do I crop a picture square?
Choose 1:1. The box becomes the largest square that fits, centred, and stays square while you drag or resize it. A square that a profile shows as a circle is on the PFP cropper page, with the masks drawn.
Does cropping to a ratio resize the photo?
No. The file holds the pixels inside the box at their own size unless you set an output size under Export. The contract above Download says 1.0× when nothing is resized.
What does 'leaves out' mean under the ratio chips?
It is the part of the photo outside the box: how many pixels across and down, and what share of the picture that is. A wide photo cropped to 4:5 loses most of its width, and the line says so before you save.
What is the golden ratio crop?
A box whose sides are in the proportion 1.618 to 1, about 8:5. It is offered because some people frame prints and covers with it; it is a ratio like any other here, not a composition rule the tool enforces.