/01 Fitting any image into a square without cropping
Platforms that expect square images will crop whatever you give them, usually through the middle of the subject. Sitting the image on a square matte solves it: the full picture is preserved and the surrounding area fills the rest of the frame.
Set the matte colour to suit the image and export at the size you need.
/02 Choosing a matte colour
A matte sampled from the image itself usually disappears into the composition, while pure white or black reads as a deliberate border. Which works better depends on where the image will appear — a white matte vanishes on a light background and frames sharply on a dark one.
The same technique helps with tall or panoramic images that would otherwise be cropped to a fraction of their width, and keeps a set of mixed-orientation images looking consistent when displayed together in a grid.
/03 Add a white border to a photo for Instagram
Instagram only accepts shapes between 4:5 portrait and 1.91:1 landscape, and crops profile thumbnails further. A white border solves both: the whole photo sits inside a frame of the right shape, so nothing is cut, and the clean gallery look has become a signature style for photographers.
Drop the photo in and pick the output shape: 1:1 square, 4:5 portrait or 9:16 for Stories, with a rotate option to flip the orientation. Padding sets the border thickness. The Solid style gives you a white border or any colour you choose, Blurred fills the frame with a soft, enlarged copy of the photo, and Gradient uses a smooth colour blend. Export at 1080, 1200, 1440 or 2048 pixels wide.
/04 Choosing the border thickness and colour
A slim border of around 3 to 8 percent of the width reads as a deliberate frame. A wide one turns the photo into a small print floating on a page, a minimalist look that suits single subjects and plenty of negative space.
Remember where the image will be seen. Instagram's light mode background is white, so a pure white border can merge into the app and look like empty space rather than a frame. A very light grey keeps the frame visible in light mode, and black borders stand out on both. For Stories, where a flat band of colour can look unfinished, the blurred style usually looks more polished.