About the Bulk Image Resizer tool
Resize an entire folder of photos at once. Drop in up to dozens of images, set one target width, and download the whole processed batch — heights adjust automatically per photo.
Everything runs locally in your browser. Because no file is transmitted, there is no size limit imposed by a server and no record of what you edited.
How to use it
- Add all your images together.
- Set one width, height or percentage for the whole batch.
- Download them as a ZIP.
Where batch resizing saves real time
Product catalogs, event photo sets, blog image folders and marketplace listings all need the same treatment applied consistently. Doing that one file at a time is where an afternoon disappears.
Because the work happens in your browser, there is no upload queue — the only limit is your device's memory, and processing starts the moment you drop the files in.
Choosing between percentage and fixed width
A fixed width makes every output identical, which is what a website grid or a marketplace listing needs.
A percentage preserves the relative differences between images, which suits a mixed set of portrait and landscape photos where you just want everything smaller.
Common mistakes
- Applying a fixed width to a mixed set of portrait and landscape images without checking the resulting heights.
- Processing hundreds of large files at once on a phone, which can exhaust memory.
- Overwriting the originals. Keep a master folder.
Questions people ask
How many images can I process at once?
There is no fixed cap. Very large batches of high-resolution files depend on your device's available memory.
Are the originals modified?
No. New files are produced and downloaded; your originals are untouched.
Can I convert format at the same time?
Resize here, then run the batch through the relevant converter.