The square that never goes out of style
Instagram made 1080 × 1080 famous, and it stuck. The square shows up all over the place:
- Instagram feed posts and grid previews
- Marketplace and shop thumbnails, where a grid of equal tiles looks professional
- Profile pictures and podcast covers that are displayed square
- Catalogue sheets and printed contact sheets
Your iPhone shoots 4:3 by default, so every photo needs trimming to become square.
Fill vs fit, in plain English
There are two ways to get a rectangle into a square box.
- Fit shrinks the photo until all of it fits, then leaves empty bars at the sides or top and bottom. You keep the whole photo but get a letterbox.
- Fill shrinks the photo until it covers the box, then trims what spills over. No bars, a little lost at the edges.
This page uses fill with a centre crop. That’s what social apps expect: a clean, edge-to-edge square.
| Your photo | What gets trimmed |
|---|---|
| Portrait (3:4) | Top and bottom |
| Landscape (4:3) | Left and right |
| Already square | Nothing, just resized |
When the centre isn’t the point
Centre-cropping is right for most photos, but not for a friend standing at the edge of the frame. For those, open Crop HEIC, pick the 1:1 preset, and drag the box onto your subject. Then bring the result back here to resize it to exactly 1080 px.
Fixing a photo that’s lying on its side? Do that first with Rotate HEIC, otherwise the crop happens on the wrong axis.
Shop thumbnails in one batch
Drop a whole folder of product photos and you get a matching set of squares, all the same size, ready for a listing grid. Quality is set to 90, which keeps product detail sharp while files stay small. If your marketplace has a size cap, chain this with compress to 500 KB.
Straight from your phone
On iPhone, choose photos from your library, let them process, then tap Save to put the squares back in Photos, ready for the Instagram app. It all happens in Safari, with nothing uploaded on the way.