Instagram's classic square post renders best from a 1080 × 1080 pixel source — upload something else and the app recompresses and crops on its own terms. Sizing the image yourself keeps control of what gets cut.
This page opens the local resizer preset to 1080 × 1080. Cover mode center-crops to fill the square exactly; contain mode fits your whole photo inside it instead. The preset is a starting point — every dimension stays editable.
Loading tool…
This is Resize Image preconfigured for this task — open the full tool for every option.
Select an image to see its current dimensions.
Enter a width/height or percentage, or pick a platform preset (each shows its exact pixels).
Choose fit behaviour: contain, cover (center-crop), or stretch.
Preview the resulting dimensions, then export.
The exported image is re-decoded and its pixel dimensions are compared to your requested dimensions before download is offered.
Cover fills the full 1080 × 1080 square by center-cropping — right for photos. Contain shrinks your whole image to fit inside the square, leaving padding — right when nothing may be cropped.
Yes — every platform re-encodes uploads. Supplying the exact target size means that recompression is the only quality hit, with no additional scaling pass.
Technical guidance for choosing settings and reviewing the result.
There is no quality percentage that makes every image exactly 1 MB or 100 KB. A reliable target-size workflow measures real encodes, preserves the best result under the limit, and tells you when resizing is necessary.
8 min read · Reviewed August 2026