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.
Frequently asked questions
What size does the Instagram post size page start with?
The calculator and crop frame start at 1080 × 1350 pixels, which reduces to 4:5. You can type any other width and height.
Is 1080 × 1350 an official requirement?
No. Sizes on this site are common examples, not current platform upload specifications. Check the platform before you publish.
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.