How to Resize an Image for Instagram

Instagram crops or letterboxes images that don't match its ratios. Post perfectly every time:

The sizes that matter

• Square post: 1080×1080 (1:1)
• Portrait post: 1080×1350 (4:5)
• Story/Reel: 1080×1920 (9:16)
• Landscape post: 1080×566

How to do it

Upload to the Image Resizer, lock the aspect ratio or use the Cropper for a precise ratio, then download. Everything happens locally.

Sharpness tip

Resize from a larger original down to 1080px — never upscale from a small screenshot.

Try it free: Resize Image →