How to use the image splitter
- Choose an image or drop it on the box. The preview appears with white grid lines.
- Set the number of rows and columns, or press a preset such as 3 x 3. The preview and tile size update immediately.
- Pick PNG for lossless tiles or JPG for smaller files.
- Press Split and download ZIP. All tiles are created on your device and packed into one ZIP file.
- Unzip it. Tiles are named in reading order, left to right and top to bottom, such as photo-05-r2c2.png.
How the grid is cut
The image is divided into the rows and columns you choose. If the width does not divide evenly, the leftover pixels are spread one at a time over the first columns, so the tiles differ by at most one pixel and every pixel of the original lands in exactly one tile. A 1000 by 700 image split into 2 rows and 3 columns gives column widths of 334, 333 and 333 pixels, and two rows of 350 pixels. Add the tiles together and you get the original size back with nothing missing or repeated.
Each tile is cut directly from the full resolution picture, not from the preview. Photos taken on a phone are shown the right way up, because the camera orientation is applied before cutting.
Common uses
A 3 by 3 grid is a popular way to turn one large picture into nine posts that line up on a social profile, and a 3 by 1 split makes a panoramic carousel. Profile grids usually show the newest post first, so upload the last tile first and finish with tile 1. Check the current behavior of the app you use.
Splitting is also useful for printing a large picture across several sheets of paper, preparing puzzle pieces for a classroom, or breaking a long screenshot into readable parts. Use JPG for photos to keep the ZIP small, and PNG for screenshots and graphics with sharp lines or transparency.
Limits and privacy
The image can be up to 25 MB and the grid up to 20 rows and 20 columns, with at most 100 tiles. The grid cannot have more tiles across or down than the image has pixels. Everything is done in your browser, nothing is uploaded, and the ZIP is built in memory. For very large pictures, use fewer tiles or resize the image first.
Assumptions and limits
- Tiles are equal in size apart from a possible one pixel difference when the size does not divide evenly.
- Tiles are numbered in reading order, left to right then top to bottom, with row and column in the file name.
- JPG tiles use a white background where the original was transparent, and quality 92.
- Animated images use their first frame, and SVG files are drawn at 1,600 pixels wide.
- The ZIP stores the tiles without extra compression, since PNG and JPG are already compressed.
Frequently asked questions
How do I split an image into a 3 by 3 grid?
Choose your image and press the 3 x 3 preset, or enter 3 rows and 3 columns. Then press Split and download ZIP. You get nine tiles numbered 01 to 09 in reading order.
In what order should I upload tiles to a social profile?
Most profile grids show the newest post first, so you usually upload the last tile first and the first tile last. Check how your app currently orders posts before you start.
What happens if the image does not divide evenly?
The leftover pixels are given to the first columns or rows, one each, so tiles differ by at most one pixel. No part of the original is cropped away or duplicated.
Should I save the tiles as PNG or JPG?
Use PNG for screenshots, logos and transparent graphics, because it is lossless. Use JPG for photographs, where it makes the ZIP much smaller with little visible change.
Is my picture uploaded when I split it?
No. The image is decoded and cut in your browser, and the ZIP is made in memory on your device. If the pieces need resizing afterward, use the image resizer.