Image Resizer

Set exact pixel dimensions for any image. The preview updates as you type, and the file never leaves your browser.

Settings

Drop an image here
or click to choose a file

Width (px)

Height (px)

Lock aspect ratio

Output format

Quality

85%

Output

Choose an image, then type the dimensions you need.

How it works

The image is drawn onto a canvas at your chosen size with high-quality smoothing, then encoded to the format you picked. When aspect lock is on, changing one dimension recalculates the other from the original proportions, so nothing gets stretched.

A practical tip: resize first, then compress. Shrinking a 4000-pixel photo to 800 pixels already throws away most of the bytes; compressing the small result afterwards gives you a clean, tiny file. Doing it the other way round — compressing the giant original and then resizing — costs quality you can't get back.

Limitation: enlarging a small image doesn't add detail. A 300-pixel icon scaled to 1200 pixels will look soft no matter what this tool does — resizing rearranges the pixels you have, it can't invent new ones.