How does ImgMin Pro reduce image size while preserving visual quality?

ImgMin Pro uses the browser's native Canvas API to intelligently compress images. It analyzes each image and applies optimal compression settings based on your chosen mode (Balanced, Best Quality, or Smallest Size). All processing happens directly in your browser — no server upload required.

Is it safe to compress images with ImgMin Pro?

Yes, ImgMin Pro is completely safe. Unlike most online compression tools, ImgMin Pro processes images entirely on your device using client-side JavaScript. Your images never leave your browser and are never uploaded to any server.

What image formats does ImgMin Pro support?

ImgMin Pro supports JPG/JPEG, PNG, and WebP formats, and converts iPhone HEIC photos locally. You can compress up to 20 images at once using the batch upload feature, and download them individually or as a ZIP file.

Can I use ImgMin Pro offline?

Yes, ImgMin Pro is a Progressive Web App (PWA) that works offline. Since all image compression happens in your browser without server communication, you can compress images even without an internet connection after your first visit.

ImgMin Pro — Free Image Compressor

ImgMin Pro is a free, privacy-first online image compression tool. Compress JPG, PNG, and WebP images directly in your browser — no upload required. All processing happens client-side for maximum privacy and security.

Please enable JavaScript to use ImgMin Pro.

Compress Images Online — No Upload Required

Compress JPG, PNG & WebP locally while maintaining visual quality. Your images never leave your device.

Click, drag or paste images here

Maximum 20 images at a time

Advanced Settings

Target size Choose a common limit or enter a custom value

Custom limit (KB, optional)

Output format

Leave blank for normal compression. 1 KB = 1000 bytes. With a target, JPEG/WebP quality follows the selected strategy. PNG keeps transparency and may exceed the target.

Resize

Platform preset

Width (px)

×

Height (px)

Batch Rename

Your local totals

0images

Images Processed

0M

Space Saved

Only successful tasks in this browser are counted. Clearing browser storage resets these totals.

Your images never leave your browser — zero upload, verified.