How to use the Bulk Resize tool
- Choose to resize by width, height or percent and enter a value.
- Pick the output format, or keep each file's original format.
- Drop all your images into the box at once.
- Download files one by one or press Download all as ZIP.
Save hours on repetitive work
Resizing pictures one at a time is slow when you have a full product catalogue, a holiday album or a batch of blog images. The bulk resizer applies the same rule to every file, so a folder of 40 photos becomes web-ready in seconds.
Consistent results
Online stores look more professional when every product photo has the same width. Choose a width such as 1200 pixels and every image is scaled to it while keeping its own aspect ratio, so nothing gets stretched or squashed. Choose height mode instead when you want thumbnails that line up in a row.
One ZIP, neatly named
Each output file keeps its original name with the new dimensions added, for example beach-1200x800.jpg. When you finish, one click packs everything into a ZIP archive, which you can unzip on Windows, macOS, Android or iPhone.
Fast and private
The work runs on your own device, so speed depends on your computer or phone rather than an upload queue. Big batches of high-resolution photos may take a moment on older phones, but your files are never sent anywhere.
How to resize multiple images at once on any device
On Windows and Mac you can resize in bulk with built-in apps, but the steps differ for every system and phones make it harder still. This page works the same in any modern browser: set the rule once, select all the files from your gallery or a folder, and the tool resizes them one after another. On an iPhone or Android phone, use the Photos picker to select several pictures at once.
Tips for good bulk results
Pick a width that matches where the images will go: 1200 pixels suits most blogs, 1600 to 2000 pixels suits full-width banners, and 800 pixels is plenty for email newsletters. Choose JPG output for photos to keep files light, or keep the original format if some of your images are logos with transparency.
Frequently asked questions
How many images can I resize at once?
There is no fixed limit. Most devices handle 50 to 100 typical photos comfortably; very large batches depend on your device memory.
Can I mix JPG, PNG and WebP?
Yes. Each file can keep its own format, or you can convert them all to one format.
Does it keep the aspect ratio?
Always. Only one side is set and the other is calculated automatically.
Are the files uploaded to a server?
No. Resizing and ZIP creation both happen inside your browser.
Can I bulk resize on my phone?
Yes. Open the page in Safari or Chrome, tap the drop area and select several photos from your gallery.