Bulk Image Compressor & WEBP Converter
Supports PNG, JPG, WEBP, and BMP. Processing runs 100% locally in your browser.
How to Compress Images Online
- Drag and drop or select multiple image files (JPG, PNG, WEBP, BMP).
- Choose your compression mode (Quality percentage or Target Size in KB).
- Configure optional format conversion (e.g. convert JPG/PNG to WEBP), then click "Compress All" and download all files as a single ZIP archive.
Zero Upload Privacy & Security
Your privacy is 100% guaranteed. All image compression, file size reduction, and format conversions execute locally using browser HTML5 Canvas. No files are uploaded to any external server or third-party cloud service.
Frequently Asked Questions
Is there a file size limit for image compression?
To prevent browser tab memory exhaustion, we recommend a total batch size under 50 MB, although modern web browsers can process larger queues effortlessly.
What image formats are supported?
Img Compress supports uploading JPG, PNG, WEBP, and BMP images, with options to convert formats seamlessly into WEBP, JPEG, or PNG.
How does target file size compression work?
You specify a target file size in KB (e.g. 150 KB). Our algorithm iteratively adjusts compression parameters to shrink each image as close as possible to your target size without compromising visual quality.
Are my images uploaded to any remote server?
No. All compression, format conversion, and ZIP archiving processes run 100% locally inside your web browser. Your private images never leave your device.