Free browser tool

Batch image resizer

Resize multiple images to the same dimensions or maximum long edge.

Input and settings

How to use it

Resize several images together using either a maximum long edge or an exact width × height. Long-edge mode preserves aspect ratio; exact-size mode forces the requested dimensions.

Choose the images you want to resize.
Select Long edge or Fixed width × height and enter the target pixel values.
Run the batch, check output dimensions and inspect a few images before downloading.

Long edge: Keeps aspect ratio and only reduces images above the target
Fixed size: Forces the requested width and height
Range: 1–8000 px
Output format: PNG sources stay PNG; other common sources are saved as JPEG

Use a 1200 px long edge for mixed portrait and landscape photos

A mixed folder can be kept within 1200 px on its longest side without deciding separately whether each file is portrait or landscape.

Fixed width × height is resizing, not smart cropping. If the requested aspect ratio differs from the source, the picture stretches or squashes. Use a crop tool when the subject must fit a specific frame without distortion.

Long-edge mode is the safer default for mixed orientations

Landscape and portrait images can share one maximum size while keeping their original proportions, and already-small images do not needlessly grow.

Exact size does not choose a crop for you

Entering 1200 × 630 does not create a social-media crop. It changes the whole image to those dimensions, so a different source ratio will look distorted.

Output type follows the source category

PNG input remains PNG, while other typical image inputs are output as JPEG. When transparency matters, inspect those assets separately.

Resize first, crop second for strict aspect-ratio targets

For a fixed card such as 1200 × 630, a natural workflow is to reduce the source to a manageable size and then crop it deliberately with the subject positioned correctly.

Verify the real destination after resizing

A dimension that looks fine in a file list may still be too soft on a retina display or unnecessarily large for a thumbnail. Test representative outputs in the actual layout.