Free Image Resizer
Resize an image to exact dimensions, crop it to a 1:1 or 16:9 ratio, or pick a ready-made size for Instagram, YouTube, and more. The preview updates as you type.
Downscaling is safe, upscaling is not
Making an image smaller averages neighbouring pixels together. Detail is discarded, but nothing is guessed, which is why a downscaled photo often looks crisper than the original at its new size.
Making it larger is the opposite problem. There is no extra detail in the file to reveal, so an enlarged image can only stretch what is already there and will look soft. If you need genuinely more pixels, that takes an AI upscaler that invents plausible detail, which is a different kind of tool from this one.
File size falls with the pixel count rather than the width, so halving both dimensions leaves a quarter of the pixels and a file roughly a quarter of the size.
Resizing is not compressing
Resizing changes how many pixels an image has. Compressing changes how many bytes those pixels take up. Both shrink the file, but only one changes the dimensions, and for the web you usually want both: resize to the size it will actually be displayed at, then save it in an efficient format.
Our Image Converter handles the second half, with WEBP and AVIF output and a quality setting.
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Frequently asked questions
- Does it keep the aspect ratio?
- Yes by default. The width and height fields stay linked until you unlock them, so changing one updates the other. Unlocking lets you stretch the image to exact dimensions instead.
- Does the file format change?
- No. A JPG stays a JPG and a PNG stays a PNG, since someone resizing an image has not asked for a different file type. Use the Image Converter if you also want to change format.
- What happens when I pick a different aspect ratio?
- The image is cropped from the center to the largest area that fits the new ratio, then scaled to your chosen size. Going from a 4:3 photo to 1:1 trims the left and right edges; going to 16:9 trims the top and bottom. Nothing is stretched, and the preview shows exactly what will be kept.
- What happens to my metadata?
- It is dropped, because the image is redrawn from its pixels. EXIF, GPS, and C2PA data do not survive a resize here.