What this does
Cuts one image into an even grid of rows and columns and returns every tile as a separate image file — the tool behind the popular Instagram grid-post trend, where one large panoramic photo or piece of artwork is split into nine (a 3×3 grid) tiles and posted so the full picture reassembles across a profile grid.
How the maths works
| Grid | Tiles produced | Common use |
|---|---|---|
| 3×1 | 3 tiles | A wide panorama split across three feed posts |
| 3×3 | 9 tiles | The classic Instagram grid-reveal layout |
| 2×2 | 4 tiles | A simple four-panel split |
| Custom rows × columns | rows × columns tiles | Anything else — collages, puzzle pieces, print tiling |
Each tile is exactly the source image's width divided by the column count and height divided by the row count, so an image that does not divide evenly gets tiles that are one pixel different in size at the edges — worth choosing a grid that divides your image's dimensions cleanly when exact uniformity matters.
Getting the upload order right
The most common mistake with a grid split is uploading the tiles in the wrong sequence, which scrambles the reassembled image on the profile grid. Tiles are numbered left to right, top to bottom — the same reading order as text — and for the classic Instagram 3×3 layout, they need to be posted in reverse order (bottom-right tile first, top-left tile last), since a profile grid fills newest-post-first. Getting this backwards is the single most common reason a grid post comes out visibly wrong.
What makes a source image work well for this
- High resolution. Each tile is a fraction of the original size, so starting from a low-resolution image produces noticeably soft individual tiles.
- Simple, bold composition. An image with one clear focal point tends to split more legibly than one busy with fine detail spread evenly across the frame.
- The right aspect ratio for the grid. A square source image splits cleanly into a square grid; a very wide or tall source image produces oddly proportioned individual tiles unless the grid dimensions are chosen to match.