The 2×2 and 3×3 grids give a square that fits an Instagram post. You set the gap, background color and width, and download a PNG file.
Create a collageThe 2×2 grid (4 photos) and 3×3 grid (9 photos) make a 1:1 collage.
One background color and the same gap between all photos.
Pick 800, 1200, 1600 or 2000 px; Instagram rescales the file to its own size.
JPG, PNG or WebP files, up to 10 MB each.
2×2 or 3×3, then the gap and background color.
Upload the finished PNG to Instagram like any photo.