Square Image Maker (Fit Without Cropping)

Instagram, profile pictures, stories and printing services all want a fixed shape, and the usual crop cuts off heads, feet or the edges of a group photo. This tool does the opposite: it keeps the whole picture and enlarges the canvas around it to the shape you need, filling the new space with a soft blurred copy of the photo, a colour, the photo's own edge colour or transparency. It works in your browser, so the photos stay on your device.

How to use this tool

1. Choose one or more images (JPG, PNG, WebP, HEIC and others your browser can open).
2. Pick the shape: square, 4:5, 9:16, 16:9, a custom ratio or an exact pixel size.
3. Choose what fills the empty space and where the image sits.
4. Optionally add a margin and set the long side, for example 1080 px for Instagram.
5. Download the images, or all of them as one ZIP.

Formula

canvas width = max(w, R × h) ÷ (1 − 2m), canvas height = canvas width ÷ R

w and h are the image size in pixels, R is the target ratio (width ÷ height) and m is the extra margin per side as a fraction. The image is drawn at 100%, so no detail is lost, unless you set an output long side or an exact size; then everything is scaled to that size.

Example

A 4000 × 3000 landscape photo made square: R = 1, so the canvas is max(4000, 3000) = 4000 × 4000 px, with 500 px of fill above and below the photo. With an output long side of 1080 the result is 1080 × 1080 px and the photo shrinks to 1080 × 810 px. For a 4:5 portrait post the canvas is 4000 × 5000 instead.