Image Resizer
Set exact dimensions, scale by percentage or fit inside a bounding box with contain, cover and fill modes.
Drop images to resize
Set exact dimensions, scale by percentage, or fit everything inside a maximum box.
JPG · PNG · WebP · AVIF · GIF · BMP · TIFF · SVG
Exact dimensions
Type a width and height, with the ratio locked or free.
Fit modes
Contain, cover, fill and inside — for when the ratios don't match.
Presets
Common display and social sizes, plus your own saved ones.
Choosing dimensions and fit mode
Exact mode sets the output to the width and height you type. With the aspect ratio locked, filling in one value calculates the other so the image isn't distorted.
Fit modes decide what happens when the source ratio doesn't match the target. Contain letterboxes the image inside the box on a background colour, cover crops the overflow to fill the box completely, and fill stretches to the exact size.
Downscaling uses stepped halving rather than a single draw. Repeated halving averages more source pixels into each output pixel, so edges and text stay clean instead of aliasing.