The Bulk Image Resizer is a web tool that lets you drag, drop, and resize multiple images at once with flexible options like percentage or fixed dimensions. It supports format conversion (Auto, JPEG, PNG, WebP), preserves aspect ratio, prevents file size increases, and allows you to download individual results or all images in a ZIP.
Drag & drop up to 20 images here or click to browse.
(JPEG, PNG, GIF, WebP — other image formats will be accepted too)
Selected Images
Resized Images
Privacy: All image processing is executed entirely client-side using in-browser technologies (e.g., JavaScript). Image data never leaves your device, is not transmitted over the network, and is not written to or stored on any server. This ensures full privacy and security, as all operations occur within your local browser environment.
How to use
- Drag & drop up to 20 images into the large box (or click to browse). You’ll see each file listed with name, preview, original dimensions, size, and a Remove button.
- Pick a Mode:
• Percentage -> enter a percent to scale both sides.
• Dimensions -> optionally keep aspect ratio. When Keep aspect ratio is on, type either width or height (the other clears automatically). Turn it off to set both. - Choose Convert format (Auto, JPEG, PNG, WebP).
- Click Resize. Watch the progress bar; outputs appear showing old and new dimensions and size.
- Download results individually with Download, or click Download All (ZIP) to save everything at once.