Resize an image for an Instagram portrait post

Resize any image to exactly 1080×1350 for an Instagram portrait post, free and in your browser.

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    What size is an Instagram portrait post?

    1080×1350 pixels, which is 4:5. 1080×1350 is the tallest a feed post is allowed to be, at 4:5. It is the most screen a single post can occupy on a phone, which is why it outperforms the square for almost everything except a photograph that is genuinely square.

    The thing that catches people out

    Go taller than 4:5 and Instagram crops back to it, taking the trim from the top and bottom. A 9:16 image posted to the feed loses about a third of its height. If the picture is that tall it belongs in a story, not the feed.

    What an Instagram portrait post does to it afterwards

    1080x1350 is the tallest Instagram will show in the feed without cropping, and it takes up about a quarter more screen than a square, which is why accounts that care about reach use it by default. The catch is the profile grid, which crops every post to a square from the centre: anything in the top or bottom sixth of a portrait post is invisible there. Keep faces and text in the middle band, and treat the extra height as room for the picture rather than for anything that has to be read.

    What the crop takes off

    Four by five is taller than anything a phone shoots in landscape, so a landscape photograph loses about 40% of its width here - a much deeper cut than the square. Shot in portrait it barely loses anything at all, which is most of why this size is worth the trouble.

    Questions about an Instagram portrait post

    Is 4:5 really better than square?

    For feed reach, yes, and the reason is unglamorous: it takes up more vertical space, so it is on screen longer as somebody scrolls past. 1080x1350 is the tallest Instagram will display without cropping. Going taller does not extend the advantage, it just gets trimmed. The trade is the profile grid, which shows a square crop from the centre and cuts the top and bottom off every portrait post.

    What gets cut off in the grid?

    Roughly the top and bottom sixth of the image. The grid takes a centred square from your 1080x1350, so a caption across the bottom or a logo at the top vanishes there while looking fine in the feed. If both views matter, keep anything that has to be read inside the central 1080x1080 and use the extra height for the picture rather than for information.

    Why use 4:5 rather than a square?

    Because it takes more of the screen. A portrait post occupies roughly a quarter more vertical space in a feed than a square one, and on a phone that is the difference between filling the view and sharing it with the post above. Nothing taller is allowed for a feed post, so 1080 by 1350 is the largest claim you can make on somebody scrolling. The cost is the crop, which is severe on landscape source material.

    Other sizes

    Or any dimensions, or compress.