Instagram Grid Maker

The part every splitter leaves out

Every splitter cuts the image. What goes wrong is the upload, because Instagram builds a profile grid newest first. Your most recent post takes the top left slot and shoves everything else one place right, wrapping onto the next row. So the tile that belongs in the bottom right corner is the first one you post, and the tile that belongs top left is the last.

Post them in reading order and you get your picture mirrored through both axes, which looks like a glitch rather than a design. The tiles above are numbered in posting order for that reason: upload the one marked 1, then 2, and the grid assembles itself.

Why the columns are fixed and the rows are not

The Instagram profile grid is three columns on every device and there is no setting to change it. Tools that offer you a 4 x 4 or 5 x 5 grid are letting you build something you cannot post: the tiles come out fine and then wrap wrongly the moment they land on a profile. Rows are a real choice, columns are not, so only one of them is a control here.

Square or portrait, and what the grid does to each

The profile grid displays square thumbnails. A square tile at 1080 x 1080 is therefore the honest default: what you slice is what people see. Portrait tiles at 1080 x 1350 fill more of a phone screen when someone opens the individual post, which is why portrait is the better shape for a normal post, but the grid crops each one back to a centre square. The seams still line up, because the crop is the same on every tile. The top and bottom of each tile simply do not appear until the post is opened.

Either way the splitter crops your source to the grid's aspect ratio first and slices afterwards. Slicing first and letting each tile crop itself would move every seam by a different amount, which is the one failure a grid cannot survive. Dimensions for every other Instagram surface are in the post size guide, and the size checker will tell you what Instagram does to a file before you commit to it.

The cost nobody mentions before you do it

A grid post is not permanent. Every post you publish afterwards pushes the whole thing one place to the right, so a nine-tile image is broken by your next post and only realigns after three more. That is the arithmetic of a three column grid, and there is no way around it.

Two ways teams live with it. Post in threes from then on, so the grid shifts a whole row at a time and stays assembled. Or treat it as a launch moment, accept that it lasts until the next post, and spend the nine slots on something worth that. Neither is wrong. Deciding which one you are doing before you cut the image is what stops the regret.