How many images can I process at once?

Practically a few hundred at a time. Files are processed one after another to keep memory in check; a 200-image batch usually takes 30–90 seconds depending on file sizes and your CPU.

Are originals modified?

No. Original files on your disk are never touched. The tool reads them, creates resized copies in memory, and bundles those into a ZIP for download.

No. The Canvas API does the work locally; nothing is sent over the network.

Files never leave your device

Bulk Resize Images Online

Resize many images at once with the same settings. Download the entire batch as a ZIP file.

Drag and drop files here

or click to browse

Add as many images as you like

Max long edge (px)

Format

Quality: 85%

How to use Bulk Image Resizer

Drop in many images at once.
Set the maximum width or height (the longer edge).
Choose the output format and quality.
Click "Resize all" — every file is processed in your browser.
Download the batch as a single ZIP.

How to use Bulk Image Resizer

Frequently asked questions

How many images can I process at once?

Are originals modified?

Are images uploaded?