When you need to reduce file sizes for many images at once, compressing them one by one quickly becomes frustrating. A bulk image compressor lets you optimize multiple files in one go while keeping their resolution unchanged.
This guide shows how to compress multiple images using our Bulk Image Compressor, directly in your browser.
What our Bulk Image Compressor does
Using our Bulk Image Compressor, you can:
- Compress multiple images at the same time
- Support JPG, PNG, WebP, and BMP files
- Choose a single output format for all images
- Adjust compression quality with one slider
- Preview results and download files individually or as a ZIP
All processing happens locally on your device. Nothing is uploaded.
Step by step: Compress multiple images
1. Add your images
Click the upload area or drag several image files into the tool.
You can add images in batches and they will appear in a list with previews and file sizes.
Supported formats include JPG, PNG, WebP, and BMP.
2. Choose output format
Select the format you want for all compressed images:
- JPG for the smallest file sizes (best for photos)
- PNG for images that need transparency
- WebP for a modern balance of quality and size
The selected format applies to all images in the batch.
3. Adjust compression quality
Use the quality slider to control how aggressively images are compressed.
- Lower values create smaller files
- Higher values keep more visual detail
For most images, a setting between 70 and 85 percent gives a good balance.
4. Compress the images
Click Compress all images to start processing.
Each image is compressed one by one and marked as ready when finished.
You can also compress individual images if needed.
5. Download your files
Once compression is complete, you can:
- Download each image individually
- Download all compressed images together as a ZIP file
This is useful when working with large batches.
When should you use a bulk image compressor?
This tool is useful when:
- Preparing images for websites or blogs
- Reducing file sizes before uploading to social media
- Optimizing photos for email or cloud storage
- Compressing large image folders quickly
- Working with design or content batches
Important notes
-
Image dimensions
The tool does not resize images. Width and height stay exactly the same. -
HEIC files
HEIC images are not supported here. Convert them to JPG first, then use the bulk compressor. -
File size results
Some images may not compress much if they are already optimized.
Supported formats
- Input: JPG, PNG, WebP, BMP
- Output: JPG, PNG, WebP
Frequently asked questions
Does this upload my images anywhere?
No. All compression runs inside your browser. Files never leave your device.
Can I use this offline?
Yes. Once the page has loaded, the tool continues to work without an internet connection.
Can I compress images individually?
Yes. You can compress one image at a time or process the entire batch together.
Will this reduce image quality?
Compression can introduce minor quality loss depending on the setting you choose. Higher quality values keep images looking closer to the original.
Can I download everything at once?
Yes. All compressed images can be downloaded together in a single ZIP file.
Try the tool
You can compress multiple images at once using our
Bulk Image Compressor
No uploads, no accounts, just fast batch image compression in your browser.