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.

No uploadNo signupDownload as ZIPPrivate by design

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

1

Add your images

Drop in as many images as you want. They load into your browser, nothing is uploaded to a server.

2

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.

3

Set the quality

For JPG and WebP, slide the quality to balance sharpness against file size. PNG stays lossless.

4

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

Resize Image →Compress Image →Convert Image →Image Optimization Guide →

Frequently asked questions

How do I resize multiple images at once?+
Drop all your images into the tool, choose a target size in pixels or a percentage, then click resize. Every image is processed in one go and bundled into a single ZIP you can download.
Can I resize by pixels and by percentage?+
Yes. Use fit mode to keep every image inside a max width and height, which is handy when files have different shapes. Or use percent mode to scale them all by the same amount, like 50 percent.
Does this bulk resizer upload my files to a server?+
No. Everything runs in your browser using your own device. Your images are never uploaded, never stored, and never seen by us. It is private by design.
Can I control image quality when resizing?+
Yes. There is a quality slider for JPG and WebP files. Lower quality means smaller files, higher quality keeps more detail. PNG files stay lossless since PNG does not use quality settings.
How do I download all the resized images as a ZIP?+
After resizing, the tool builds a single ZIP archive in your browser and gives you one download button. Every resized image is inside, named with its new dimensions so they are easy to tell apart.
What image formats does the bulk resizer support?+
JPG, PNG, WebP, GIF and BMP. Each image keeps its original format where possible, so a PNG comes out as a PNG and a JPG comes out as a JPG.