Bulk Image Resizer Online
Resize a whole folder of images in one shot. Set a size in pixels or a percentage, pick your quality, and download everything as a single ZIP. No upload, no signup, and it all happens in your browser.
Drop many images to resize them all at once
JPG, PNG, WebP, GIF or BMP. Nothing is uploaded.
100% browser-based. Your images never leave your device.
How to bulk resize images
Add your images
Drop in as many images as you want. They load into your browser, nothing is uploaded to a server.
Choose pixels or percent
Fit every image inside a max width and height, or scale them all by a percentage. Aspect ratio is kept for you.
Set the quality
For JPG and WebP, slide the quality to balance sharpness against file size. PNG stays lossless.
Download the ZIP
Hit resize and grab one ZIP with every resized image inside, named with its new dimensions.
Fit within a size, or scale by percent
Two modes cover almost everything. Fit mode takes a max width and height, then shrinks each image to sit inside that box while keeping its shape. Drop in a mix of portrait and landscape photos and they all come out sized sensibly. This is the one to use when you need images that fit a spot on a website or a form.
Percent mode just scales everything by the same amount. Set 50 percent and every image becomes half its size. Handy when you want the whole batch smaller but do not care about hitting an exact pixel target. Aspect ratios are always preserved, so nothing ends up stretched.
Bulk resize vs compress
People mix these up. Resizing changes the dimensions, the actual width and height in pixels. Compressing keeps the dimensions but lowers the quality to shrink the file. They both make files smaller and they work great together. This tool does both at once, it resizes the pixels and lets you set a quality for JPG and WebP. If you only need smaller files without changing dimensions, the compress tool is the better pick.
Who needs to resize in bulk
- Online stores: get every product photo to the same size before uploading to Shopify or WooCommerce.
- Bloggers and site owners: shrink a batch of full size phone photos so pages load fast.
- Email and forms: drop a pile of images under an attachment or upload limit in one pass.
- Photographers: make web sized previews of a whole shoot without touching them one by one.
Related tools and guides
Fit within never enlarges
In fit within mode, each image is scaled down just enough to fit inside the width and height you set, keeping its proportions. An image that is already smaller than your limits is left at its original size rather than stretched, so a batch of mixed sizes comes out safe.
Percentage mode is different. It scales every image by the same amount, from 5 to 200 percent, so it can enlarge. Use it when you want a consistent reduction across a set, and fit within when you need everything under a maximum size.
What format each file comes back in
Keeping the format means a folder of PNG graphics stays crisp and a folder of JPG photos stays small. JPG outputs get a white background behind any transparent areas, since JPG cannot store transparency.
Large batches
Every image is processed in your browser, so the practical limit is your device's memory rather than a file count. A batch of a few dozen phone photos is quick on any modern computer. For hundreds of very large files, resizing in a few smaller batches is smoother, especially on a phone.