Picking the right canvas shape
Choose the shape for where the collage will be seen. Platforms change their recommendations, so treat these as typical values and check the platform's help pages before you post. Matching the shape up front avoids the app cropping your carefully framed edges:
- Square 1:1: works almost everywhere, including feeds, profile grids and messaging apps.
- Portrait 4:5: the tallest shape most feeds show in full, so it takes up more of the screen.
- Story 9:16: full-screen stories and status updates. Keep faces away from the top and bottom edges, where app buttons appear.
- Landscape 16:9: presentation slides, video thumbnails and website banners.
- A4 portrait: a printable page. At 1,448 × 2,048 px it prints at about 175 DPI on A4, fine for a noticeboard but softer than a photo print.
Tips for a collage that looks balanced
Start with your strongest photo. Layouts with one large cell, such as "one large, four small", give the eye a clear place to land, so put your best shot there with the swap button or the "Photo in this cell" menu.
Match cell shapes to photo shapes. A tall portrait in a wide cell loses its top and bottom, so drag it until the important part shows, or switch to a layout with taller cells. Zoom lets you turn a busy scene into a close-up, and gives a group of mixed photos a more uniform scale, for example by making faces a similar size in every cell.
Keep spacing consistent with the mood. Thin gaps of 8–16 px look modern; wider white borders with rounded corners feel like a scrapbook. A dark background suits night shots, and for a page with its own colour, export a PNG with a transparent background.
If photos are tilted or sideways, fix them first with Rotate & Flip Image.
Image quality and file size
The collage is always 2,048 pixels on its long side. Each cell gets only part of that, so a 3×3 grid gives each photo about 660 px across with the default spacing. That is plenty for screens, and it means you don't need to resize photos first. Zooming past about 200% in a small cell can look soft if the original photo was small.
JPG at 85–92% quality usually gives a file of a few hundred kilobytes to around 1.5 MB, depending on detail. PNG is lossless, so it is larger. If a website or form has a size limit, run the result through the image compressor. To animate the same photos instead, try Images to GIF.