Converts an image to one of six common aspect ratios at an output width you set. Either crop to fill the new frame from the centre, or fit the whole picture inside it with padding in a colour you choose.
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Choose from square, 4:3, 16:9, 3:2 and the two portrait ratios, enter a width, and the height is calculated for you.
The ratio is the shape and the width sets the scale, so 16:9 at 1920 gives 1080 high, and 1:1 at 1080 gives a square. This is easier than working out both numbers yourself and removes the arithmetic slips that produce an image one pixel off a requirement. The presets cover the shapes most platforms and displays actually ask for.
Cover scales the image until it fills the frame and trims the overflow. Pad fits the whole image inside and fills the rest with a colour.
This is the only real decision here. Cover gives an image with no empty space, at the cost of losing edges — fine for a landscape, risky for a group photo where someone stands at the side. Pad guarantees nothing is lost but shows visible bands on two sides. Use cover for backgrounds and photographs, and pad for products, logos, diagrams and anything where the edges are part of the content.
Cover crops evenly from the centre, so anything important near an edge can be cut.
There is no way to choose which part is kept. Converting a tall portrait photo to 16:9 removes a great deal from the top and bottom, which commonly takes the top of someone's head. When the subject is off-centre, crop first with Image Crop so you control what survives, then bring the result here for the exact dimensions. Checking the output afterwards is always worth the few seconds.
Platforms scale images to fit their own frames, and an image at the wrong shape gets cropped or letterboxed by them instead of by you.
Supplying the ratio a destination expects means you decide what is lost rather than an algorithm you cannot see. It also avoids the soft, slightly distorted look that comes from something being resized twice. Check the current guidelines for wherever the image is going, since the required sizes change, and then set that shape here.
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.
Crop to fill gives a full-frame picture but loses the edges, so it is right for photos where the subject is central. Fit with padding keeps every part of the image and adds bars of your chosen colour, which suits logos, screenshots and product shots that must not be trimmed.
No. The crop is always centred. If the subject is off-centre, crop it manually first with the Image Crop tool, then convert the ratio.
It can be. The output is always the width you type, so a small image asked to become 1080 px wide is scaled up and will look softer. Set the width no higher than your original if you want to avoid that.
No, it is filled with the colour picker's value (white unless you change it), even for PNG. If you need transparent bars, use the Canvas Resize tool instead.
Yes, there are six presets and no custom ratio field. For arbitrary exact dimensions use the Image Resizer, which takes width and height directly.
Crop an image by dragging a box or typing exact pixel values, with 1:1, 4:3, 16:9 and 3:2 presets.
Place an image on an exact-size canvas, centred, with a padding colour filling the empty space.
Resize up to 50 images to set pixel dimensions with contain, cover or stretch modes.