Free Image Resizer Online

Image Resizer changes the dimensions of photos and graphics to a specific width and/or height. It works entirely in your browser by drawing the image onto a canvas at the target size and exporting the result. The aspect ratio lock ensures images don't get distorted — if you set a new width, the height adjusts automatically to preserve proportions. You can also enter a percentage (e.g., 50%) to scale the image to half its original size.

The image is loaded into an HTML Canvas at the target dimensions. If aspect ratio is locked, the target dimension is calculated to match the original proportions. The canvas is then exported as a PNG or JPEG blob using toBlob(). Resizing up (making the image larger than the original) uses bilinear interpolation — the quality improvement is limited.