Instagram Will Crop Off a Third of This 6000×4000 Photo. Pad It to 1080×1080 First (7.3 MB → 166 KB)
Instagram's feed wants a 1:1 square. A phone or camera photo is usually 3:2 or 4:3. When you drop a landscape shot into the Instagram cropper, it doesn't pad — it hard-crops. On a real 6000×4000 photo that means a third of the pixels disappear: 1000 px off the left edge and 1000 px off the right. I measured that loss on one CC0 landscape, then padded the same file to 1080×1080 instead. The padded Instagram-ready JPEG landed at 165.6 KB from a 7.25 MB original (about 42.8× smaller), and the whole scene stayed in frame. The tool I used is SquareImage , which I make, so keep that in mind as you read. Step 1: What a hard 1:1 crop actually removes The photo is Cooking in Nature by Myles Tan (CC0 via Wikimedia Commons): 6000×4000 JPEG, 7,250,332 bytes (7.25 MB / 6.91 MiB) , classic 3:2 landscape. A center square crop keeps the short side. Height is 4000, so the kept square is 4000×4000 — that's 66.7% of the pixels. The other 33.3% is cut as 1000 px left + 1000 px right . N...