How to split an image into tiles with OnyxPDF
- Drop your image into the tool.
- Set rows and columns (3×3 is the Instagram grid standard).
- Click “Split Image”.
- Download the numbered tiles and post them in order.
Why do it in your browser instead of uploading?
- Numbered output: tiles are named in the exact order to post them, so the grid assembles correctly.
- Remainders go to the last row/column instead of distorting every tile.
- No account, no upload, no “grid maker” app install.
- Works for any grid — puzzle posts, banner splits, print tiling.
Good to know (honest limits)
- Tiles are rectangles from a uniform grid; shaped or overlapping splits are not supported.
- Instagram posting order still matters — the numbering follows the standard bottom-to-top posting convention; follow the numbers.
Frequently asked questions
How does the Instagram 3×3 grid trick work?
One big image is cut into 9 squares posted in reverse order, so the profile grid reassembles into the full picture. The tiles here are numbered for exactly that.
Are all tiles the same size?
Nearly: when the image does not divide evenly, the last row and column absorb the leftover pixels (e.g. 213 vs 214 px), so nothing is stretched.
Can I split into other grids?
Yes — any rows × columns, for example 2×4 for a wide banner.
Is my image uploaded?
No. Slicing happens locally in your browser.