How to Split a Photo Into an Instagram Grid or Carousel

Drop a photo into the grid splitter and a numbered preview appears immediately, before you've clicked anything - every tile already showing the exact order to post it in. Pick a layout, click Run, download a zip whose filenames already spell out that order.

Step 1 - drop your photo

JPG, PNG, WebP, GIF, or BMP, one image per run - choosing a new one replaces whatever was there before. For a clean 3x3 split, a source of at least 3240x3240 pixels gives each of the nine tiles a full 1080x1080 pixels with no upscaling; a smaller image still works, but the tool names the exact recommended size for your chosen layout and warns that tiles may look a little soft if the source falls short of it.

Step 2 - choose what you're posting

Purpose is a two-way switch: Feed grid, for multiple separate posts that reassemble into one picture on your profile, or Carousel, for one post with multiple swipeable slides. This decision changes more than the layout options - it changes the numbering rule entirely, which is the whole reason the switch exists as a first step rather than a setting buried in the options.

Step 3 - pick a layout and watch the preview

Feed grid offers five named presets - 3x3, 3x2, 2x3, 1x3, and 3x1 - plus a custom rows-by-columns option capped at 8 tiles per side and 30 tiles total. Carousel offers a slide-count stepper from 2 to 20. Whichever you pick, the preview grid updates immediately: each tile shows its posting number, counting down from the total for a feed grid (top-left is the highest number, bottom-right is 1) and counting up normally for a carousel (slide 1 is the leftmost). The numbers alone tell you which mode you're in without reading anything.

Step 4 - check the dotted line, if you're in Grid mode

Feed-grid tiles show a dotted inset rectangle - a guideline, not a fixed pixel value, since Instagram's own profile-grid preview has been rolling out a taller crop on some accounts. Keep faces, logos, and text inside the dotted area so the mosaic still reads correctly whichever crop a given viewer's app happens to show. The file you actually export is always the full square either way; the dotted line only marks a safer zone to compose within.

If a preset doesn't fit

Custom lets you set rows and columns directly instead of picking a named preset, up to 8 tiles on either axis and 30 tiles total. Editing one axis clamps the other automatically if needed to stay under the 30-tile ceiling, so a value that would push the total too high adjusts predictably rather than silently failing or producing a layout you didn't ask for.

Why the output is always a JPG

Every tile is exported as a JPEG at quality 0.92, regardless of what format the source image was. That's not a limitation - it matches what Instagram itself does to every photo on upload, re-encoding it to JPEG on its own servers no matter what you send. Exporting tiles as JPG to begin with means there's no accuracy lost by choosing a different format first and having Instagram convert it anyway; the file you download is already in the format the platform is going to use.

Step 5 - run it and post in order

Click Run and the tool slices the working image into tiles, encodes each as a JPG, and zips them with filenames that already spell out the order: 01-post-first.jpg through the highest number, -post-last.jpg. A posting-order.txt file rides along in the zip with the same sequence spelled out in plain text, and the success panel shows a numbered list with a thumbnail of every tile - so you can follow along on your phone while uploading without reopening the zip to check which file is next.

Everything - decoding the source, slicing it, building the zip - happens in your browser. The photo is never uploaded anywhere to produce the split.

If your image is smaller than the layout wants

Choosing a layout that needs more resolution than your source has doesn't block you - it's still your photo to use however you want - but a warning names the exact recommended size for the layout you've picked, so you can decide with real information rather than a vague sense that something might look off. Switching to a smaller grid (a 2x2 instead of a 3x3, for instance) is usually the fix if the softness would actually be noticeable; sometimes it isn't, and the warning is just there so that's a decision you make on purpose.