About Bulk Image Resizer
When you have a folder of photos to prepare for a website, listing or email, resizing them one by one is slow. This tool accepts many files at once, applies the same maximum width or height, and processes everything locally without uploads or queues.
You can also convert the whole batch to a single output format such as WebP, and each file reports its new dimensions and size so you can confirm the result before downloading. It is the fastest way to standardise a mixed set of images from different cameras.
How to use Bulk Image Resizer
- Add many images
Select or drag a whole batch of JPG, PNG and WebP files. They are listed with their original dimensions.
- Set the target size
Enter a maximum width and height, choose whether to keep the aspect ratio, and pick the output format for the whole batch.
- Resize and download
Click Resize All and download each result, or save them one by one from the list. No file ever leaves your device.
Frequently Asked Questions
How many images can I resize at once?
There is no hard limit — the practical ceiling is your device's available memory, since each image is decoded in the browser. Batches of several dozen typical photos work fine on a modern phone or laptop; for very large sets, process them in groups.
Will resizing many images take a long time?
Processing is fast because there is no upload and no server queue. Each image is resized locally, typically in a fraction of a second, and the list updates as each file completes.
Can I convert the whole batch to WebP?
Yes. Choose WebP as the output format and every image in the batch is converted as well as resized, which is an easy way to shrink an entire gallery for the web in one pass.