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Instagram post size: 1080 × 1080 px

The square feed post, at the size Instagram stores rather than the one it shows.

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Drop images to resize

or click to browse, or paste with Ctrl/Cmd+V — drop several at once to process a whole batch

Instagram post size at a glance

Why 1080 × 1080 and not larger

Instagram caps the long edge of a feed image at 1080 pixels. Upload a 4000-pixel square and it is resampled down to 1080 on Instagram's servers, with Instagram's own compression settings and no say from you — which is where the mushy, over-sharpened look of a re-compressed photo comes from. Sending exactly 1080 × 1080 means the only resample that happens is the one you controlled.

The square is the safe default rather than the best-performing one. Portrait at 1080 × 1350 takes up more vertical space in the feed and is what most accounts post now; landscape at 1080 × 566 is the least screen the feed will give you. All three sit inside the same 1080-pixel width ceiling, so a square is the shape that survives being cropped into a grid tile, a story reshare and a profile preview without losing anything at the edges.

One caveat about the grid: the profile grid itself now shows a 4:5 portrait crop of each post rather than a square, so a square image is trimmed at the top and bottom there. Keep anything that must stay visible — a face, a price, a logo — away from the outer few percent of the frame.

How to resize an image to 1080 × 1080

  1. Drop your image on the panel above — or paste it, or drop several at once to do a batch.
  2. The width and height are already set to 1080 × 1080, and the aspect lock is off so both numbers are honoured exactly.
  3. If your source is a different shape, crop it to 1:1 first — resizing a different ratio straight to these numbers stretches it.
  4. Pick an output format. JPEG for photographs, PNG for flat colour, text and anything needing transparency.
  5. Download. Nothing was uploaded at any point — the resize ran on your own machine, in this tab.

Questions

Does Instagram compress my image anyway?

Yes — it re-encodes uploads to its own JPEG settings. What you control is whether it also has to resize first. Arriving at exactly 1080 pixels wide means only one lossy step happens instead of two.

Should I post square or portrait?

Portrait at 1080 × 1350 occupies more of the screen in the feed, which is why most accounts use it. Square is safer if the same image has to work as a grid tile, an ad and a profile preview.

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