READY-TO-USE IMAGE TOOL
1:1 aspect ratio crop tool.
1:1 aspect ratio uses a 1080 × 1080 pixel frame (1:1). The calculator and local image crop below are already set to that shape, so you can enter dimensions or choose an image immediately.
This is an exact mathematical ratio, not a platform upload requirement. Your image stays in this browser.
Find the ratio
Enter your pixel dimensions. Whole-number dimensions reduce to an exact ratio.
Match a ratio
Set one dimension to find the other without stretching.
Matching height: 1080 px
Matching width: enter a height
Calculated values may have fractional pixels. Round to whole pixels when exporting a raster image.
Frame your image
Choose an image or drop it below. Drag the frame to position your crop; arrow keys move it too.
or drop a file here
No upload. The image never leaves your device; nothing is saved by this site.
Put this frame to work
From a 1920 × 1080 landscape, a full-height square crop measures 1080 × 1080. That removes 840 pixels horizontally; placing the frame left or right decides which detail survives.
Resizing preserves a source image's shape; cropping removes edges to fit a different one. Download the crop as PNG or JPEG above.
Common 1:1 pixel sizes
| Width | Height | Pixels |
|---|---|---|
| 500 | 500 | 250,000 |
| 1080 | 1080 | 1,166,400 |
| 2048 | 2048 | 4,194,304 |
A square holds width × height pixels; at 1080 × 1080 that is 1,166,400. Doubling a square quadruples its pixel count.
Frequently asked questions
What size is a 1:1 image?
Width equals height. Common choices: 500 × 500, 1080 × 1080, 2048 × 2048.
Is 1080 × 1080 the Instagram size?
It is the classic square post frame. The platform accepts other shapes too, and display rules change, so check current guidance.
What size does the 1:1 aspect ratio page start with?
The calculator and crop frame start at 1080 × 1080 pixels, which reduces to 1:1. You can type any other width and height.
Is my image uploaded anywhere?
No. The image is decoded and exported in your browser, so no image data is sent to a server.
Which image formats can I use?
Choose a PNG or JPEG image, and download the result as PNG or JPEG.
Can I crop to a different ratio?
Yes. The crop ratio menu offers 16:9, 4:3, 1:1, 9:16, 21:9 and 3:2, and the calculator accepts any width and height.