How does ImgMin Pro compress images without losing 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.

免费在线图片压缩工具 - 本地处理不上传

点击、拖拽或粘贴图片到这里

Maximum 20 images at a time

高级设置

目标大小 选择常用上限，或在下方自定义

自定义上限（KB，可选）

输出格式

留空使用常规压缩。1 KB = 1000 字节。设置目标后会按当前策略降低 JPEG/WebP 质量；PNG 保留透明，可能无法达标。

调整尺寸

平台预设

宽度（px）

高度（px）

批量重命名

ImgMin Pro 累计处理

25,700+

累计处理图片

51 GB+

累计节省空间

基于时间的估算值，包含本浏览器已完成的任务；不代表服务器全量统计。

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