How to split an image
- Add the image by dropping it on the box, pasting it, or choosing a file.
- Pick what you are splitting for: a custom grid, an Instagram carousel, an Instagram profile grid, two halves, or a poster printed on several sheets.
- Check the preview. Dashed lines show every cut and each tile carries its number, so you can see the order before downloading.
- Download single tiles by clicking them, or everything at once as a ZIP. File names start with the tile number, so they sort in the right order.
Presets and sizes
| Preset | Tiles | Tile size | Order |
|---|---|---|---|
| Custom grid | Rows × columns, up to 20 × 20 | Original pixels divided evenly | Left to right, top to bottom |
| Instagram carousel | 2 – 10 slides in one row | 1080 × 1350 px (4:5) | Slide 1 on the left |
| Instagram grid, square | 3 across, 1 – 5 rows | 1080 × 1080 px | Post 1 = bottom right |
| Instagram grid, portrait | 3 across, 1 – 5 rows | 1080 × 1350 px | Post 1 = bottom right |
| Halves | 2 | Half the width or height | Left/top first |
| Poster print | Calculated from paper size | One page each, with overlap | Page row-column |
Splitting an image for Instagram
Seamless carousel (panorama)
A carousel post can hold up to 20 images, and every slide takes the aspect ratio of the first. The largest shape that fits is portrait 4:5, 1080 × 1350 pixels, so a three-slide panorama needs an image of 3240 × 1350 (a 12:5 ratio). If your photo has a different shape, Crop to fill trims the edges evenly and Fit, add background keeps the whole picture with bars in the colour you pick. Put important details away from the joins: when someone swipes, the seam can land mid-face.
Profile grid (puzzle feed)
A grid post spreads one picture across three, six or nine separate posts. Because Instagram shows the newest post first, the tiles must be posted in reverse: bottom-right first, top-left last. The tool numbers them in exactly that upload order. Keep two caveats in mind. First, Instagram’s profile grid currently shows posts in a taller 3:4 frame, which trims a little from the sides of each tile, so leave a margin around faces and text. Second, anything you post later shifts every tile by one position, so plan the whole grid before starting and post all of it in one session.
Printing a poster on multiple pages
The poster preset turns any image into a set of printable pages (a technique often called tiling or rasterbation). Choose the paper, orientation and number of pages across; the number of rows follows from your image’s shape. Overlap repeats a strip of the picture on neighbouring pages so you can trim one edge and glue or tape the sheets without gaps; 10 mm suits most home printers, which cannot print right to the edge. The note under the settings shows the finished size and resolution:
| Print resolution | Result |
|---|---|
| 150 dpi or more | Sharp at arm’s length |
| 100 – 150 dpi | Good for wall posters viewed from a metre away |
| Under 100 dpi | Visible pixels up close; use fewer pages or a larger source image |
Print every page at 100% / actual size with “fit to page” turned off, or the pieces will not line up. Pages are labelled row-column (Page 2-3 is the second row, third column).
Other uses
- Split into 3 equal strips for a triptych, a three-panel canvas print or a three-image banner.
- Cut sprite sheets into individual frames with a custom grid matching the sheet’s rows and columns.
- Break long screenshots into pages with several rows and one column so each part fits a phone screen or a slide.
- Make jigsaw-style puzzles for classrooms, or hand out one piece per team.
Privacy and file formats
Everything runs locally: the image is drawn onto a canvas, cut into tiles, and packed into a ZIP by a small built-in writer that stores files without compression (PNG and JPG are already compressed). PNG keeps exact pixels and transparency; JPG gives smaller files for photos. To resize or crop before splitting, use the image resizer or image cropper; to join images instead, try image merge.
Frequently asked questions
How do I split an image into equal parts?
Load the image, keep Custom grid selected and set the number of rows and columns, for example 1 row and 3 columns to split it into 3 vertical strips. The tiles appear instantly; click any tile to download it or use Download all as ZIP.
How do I split a panorama for an Instagram carousel?
Choose Instagram carousel and pick the number of slides. The image is fitted to a strip of 1080 × 1350 pixels per slide, the tallest 4:5 shape Instagram allows, and split into slides numbered 1 onwards. Upload them together as one carousel post in that order so swiping reveals a seamless panorama.
In what order do I post an Instagram grid?
Post the tile labelled Post 1 first. It is the bottom-right piece. Continue up to the highest number, which is the top-left piece. Instagram puts the newest post at the top left of your profile, so posting in reverse reading order makes the picture line up.
How do I print a large image on multiple pages?
Choose Poster, pick your paper size and orientation, and set how many pages across you want. The calculator works out how many rows you need, adds an overlap so you can trim and glue the sheets, and shows the finished poster size and print resolution. Print every page at 100% or actual size.
Does splitting reduce image quality?
Custom grids and halves copy the original pixels exactly when you download PNG. Instagram presets resize to 1080 pixels wide per tile, which is what Instagram displays anyway. JPG downloads are saved at 92% quality.
Is there a limit on image size or number of tiles?
Custom grids go up to 20 × 20 tiles. Very large images depend on your browser's canvas limit, which is usually around 16,000 pixels per side on desktop and less on phones.
Are my images uploaded?
No. Splitting, resizing and ZIP creation run entirely in your browser with the canvas API and a small built-in ZIP writer, so your photos never leave your device.