READY-TO-USE IMAGE TOOL
21:9 aspect ratio crop tool.
21:9 aspect ratio uses a 2520 × 1080 pixel frame (7:3). 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
For an exact 21:9 export at 1080 pixels high, choose 2520 pixels wide. A 2560 × 1080 display resolution is close but not exactly 21:9; its reduced ratio is 64:27.
Resizing preserves a source image's shape; cropping removes edges to fit a different one. Download the crop as PNG or JPEG above.