READY-TO-USE IMAGE TOOL
Instagram post size crop tool.
Instagram post size uses a 1080 × 1350 pixel frame (4:5). The calculator and local image crop below are already set to that shape, so you can enter dimensions or choose an image immediately.
Common size as of 2026-09; platform display and upload rules can change. Check the platform before publishing. 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: 1350 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 a portrait feed graphic, start with a 1080 × 1350 frame. Cropping the same image to a square leaves 1080 × 1080 and discards 270 pixels of height, so check where the caption sits.
Resizing preserves a source image's shape; cropping removes edges to fit a different one. Download the crop as PNG or JPEG above.