Image Tools

Canvas Resize

Fits an image inside a canvas of an exact width and height that you choose, centring it and filling the empty space with a padding colour. The image is scaled, not cropped or stretched.

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Process

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Up to 1 files

Width (px)

Height (px)

Padding colour

The whole image is scaled to fit and centred on a canvas of exactly the size above; the empty area is filled with the padding colour (JPEG output) or that colour is used as the fill for all formats.

How to Use

1Add one image by dropping it on the upload area or choosing it from your device.
2Enter the Width (px) and Height (px) of the finished canvas. The defaults are 800 and 600.
3Pick a 'Padding colour' with the colour picker (white by default).
4Click 'Resize Canvas'.
5Download the result, which is exactly the size you entered.

About this tool

Updated October 1, 2026

An exact canvas, with the whole image kept

Your image is scaled to fit inside the width and height you enter, centred, and the space left over is filled with a colour you pick.

The output is exactly the dimensions you asked for, every time. Nothing is cropped and nothing is stretched, because the image is scaled by a single factor chosen so that it fits entirely within the box. When the image and the canvas have different shapes, the difference shows up as even bands of your chosen colour on two sides — at the top and bottom for a wide image in a square canvas, or at the sides for a tall one.

Padding instead of cropping

Use this when the whole picture has to survive and a fixed size is required. Use a cropping tool when filling the frame matters more.

The two approaches answer different questions. Cropping fills the frame completely but throws away whatever falls outside it, which is wrong for a product shot, a logo or a diagram where the edges are part of the content. Padding keeps everything and accepts visible bands. Marketplace listings, slide decks and app store screenshots usually demand an exact size while still needing the entire image, which is precisely this tool's job.

Choosing the padding colour

Match the background the image will sit on. White is the usual safe answer, and it is also what JPEG output gives you regardless.

If the image will appear on a white page, white padding is invisible and the result looks like a properly sized image. On a dark interface, white bands are obvious and a matching dark colour is better. When the picture has a solid background of its own, sampling that same colour makes the join disappear entirely. Saving as JPEG always flattens onto the fill colour, since JPEG cannot store transparency.

Enlarging beyond the original has limits

Asking for a canvas larger than the image scales it up, and upscaling softens rather than sharpens.

The image is enlarged to fit the box, so a small picture placed in a large canvas will look soft. If you only want the extra space and not the enlargement, the answer is a larger original. For meeting a minimum-dimension rule where softness is acceptable, this works. To change the image size itself rather than the canvas around it, Image Resizer and Resize by Percentage are the direct tools.

Resizing Images for Social Media and Print, Without the Guesswork
Pixels, aspect ratios and print sizes are three separate ideas. Here is how to calculate the size you need and resize or crop to it cleanly.

Features

One image per run
Output is always exactly the width x height you type
The whole image is scaled to fit inside the canvas and centred, so nothing is cropped or distorted
Padding colour picker for the empty area
Output keeps the original file format, based on its extension
Runs in your browser; the image is not uploaded

FAQ

Will small images be enlarged?

Yes. The image is scaled to fit the canvas, so an image smaller than the canvas is scaled up until it touches the width or height limit. If you only want to add space around it without changing its size, this tool does not do that.

Can the padding be transparent?

No. The tool always fills the empty area with the colour from the picker, even for PNG output, so it cannot produce transparent borders.

How is this different from cropping or resizing?

Cropping cuts pixels away and a normal resize changes the image's proportions or overall size. Canvas Resize keeps the whole picture and its ratio and adds coloured bars where the ratio does not match. If you would rather fill the frame and lose the edges, use the Image Resizer or Social Media Resize tool.

Is my image uploaded?

No. The canvas is built in your browser and the file stays on your device.

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Resize up to 50 images to set pixel dimensions with contain, cover or stretch modes.

Aspect Ratio Converter

Change an image to 1:1, 4:3, 16:9, 3:2, 9:16 or 2:3 by cropping or padding.

Image Crop

Crop an image by dragging a box or typing exact pixel values, with 1:1, 4:3, 16:9 and 3:2 presets.