Expand the canvas and add a border around your image
Expanding the canvas means adding extra space around your existing image rather than changing the image itself. Your original photo stays exactly the same size and sharpness — Pixohub simply draws a larger rectangle behind it and fills the new area with the color you pick. This is fundamentally different from resizing or scaling: nothing is stretched, squeezed, or interpolated, so there is no loss of quality. The pixels of your photo are preserved pixel-for-pixel and surrounded by a clean margin.
The classic use is adding a white border, the kind you see on framed prints and gallery-style social posts. A crisp white margin gives an image room to breathe, separates it from a busy background, and looks tidy and intentional. You can also use a black border for a cinematic look, or any color you like to match a brand or a slide deck. Because you control how much padding to add and on which sides, you can create an even frame all around or, for example, extra space only at the bottom to leave room for a caption.
Pixohub builds the expanded canvas entirely in your browser using the HTML Canvas API. A new canvas is created at the larger dimensions, filled with your chosen color, and your original image is drawn on top at its native size in the position you set. The result is encoded as a PNG, which keeps the border color exact and, if you choose a transparent fill, preserves that transparency too. Nothing is uploaded to a server, so it is instant, private, and works offline once the page has loaded.
Make any photo square for Instagram and more
One of the most useful things this tool does is turn a non-square photo into a square without cropping anything out. Instagram feed posts and many other layouts prefer a 1:1 square, but most photos are rectangular. If you upload a wide landscape shot, Instagram will crop the sides; if you upload a tall portrait, it crops the top and bottom. By padding the shorter dimension with a border instead, you fit the whole image inside a square frame and lose none of the content. Turn on Make Square and the tool automatically adds equal margins to the shorter side so the final canvas is a perfect 1:1.
White padding is the most popular choice for this because it blends into Instagram's white interface and looks like a deliberate matte frame, but you can pick any color to suit your feed's aesthetic. The same technique works for other platforms and purposes: pad a screenshot to give it whitespace before dropping it into a presentation, add a margin around a product shot so it sits comfortably inside a catalog cell, frame a logo with breathing room, or add space at one edge to overlay text later without covering the subject.
Because expanding the canvas never scales the original, it is also a safe way to standardize a set of images to the same dimensions. You can give several differently sized photos the same square or 4:5 canvas so they line up neatly in a grid, all without cropping or distorting any of them. Combined with a consistent border color, this is a simple way to make a collection of images look like a matching set. Export each as a PNG and they are ready to post, print, or place into a design.