Bulk Image Compressor
Compress many images at once with the same settings and download them as one ZIP. Free, and nothing is uploaded.
Click to choose images, or drag and drop them here
JPG, PNG, WebP and more. You can add many files.
100% Private
Images are processed locally in your browser — nothing is uploaded.
Fast
No waiting on uploads. Compression runs right on your device.
Free & Unlimited
No account, no watermark, no file limits.
How to compress and resize images
Three quick steps. Nothing to install and nothing leaves your device.
Add your images
Drag one or many images onto the box above, or click it to browse. JPG, PNG, WebP and GIF work in every browser.
Adjust the settings
Choose the output format, then compress by quality level or by target file size such as 100KB. You can also resize by percentage or to a set width and height. Results update automatically.
Compare and download
Check the before and after previews and the size saved, then download each image or all of them as a ZIP.
Compress many images at once
Drop a whole set of images onto the box, or select several in the file picker. All of them use the same settings.
- One set of settings: change the format, quality, target size or resize option and every image updates.
- Totals: the summary shows the combined size before and after, and each image shows its own saving.
- Download all: when there is more than one result, a button saves everything as compressed-images.zip. If two files share a name, a number is added.
- Big batches: the tool sets no limit, but the images are processed one after another on your device, so very large batches are easier on a computer.
More image compression options
Frequently asked questions
Quick answers about the ConvertKit Lite Image Compressor & Resizer.
Are my images uploaded to a server?
No. Compression runs in your browser, so your images are not uploaded anywhere.
Can I process many images at once?
Yes. Add as many images as you like, then download them one by one or all together as a ZIP.
Why is my result sometimes larger?
Flat graphics and screenshots can compress better in their original format. The result list marks any file that grew so you can keep the original.
Does it work on a phone?
Yes, in any modern browser. Big batches of large photos are easier on a computer, because processing uses your device's memory.
How many images can I compress at once?
The tool sets no limit. Your device memory is the real limit, so split a very big batch into smaller groups.
How do I download all the compressed images?
Use the Download all (ZIP) button that appears when you add more than one image. You can also download each image on its own.