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.

免費線上圖片壓縮工具 - 本地處理不上傳

點選、拖拽或貼上圖片到這裡

一次最多隻能上傳 20 張圖片

進階設定

目標大小 選擇常用上限，或在下方自定義

自定義上限（KB，可選）

輸出格式

留空使用常規壓縮。1 KB = 1000 位元組。設定目標後會按當前策略降低 JPEG/WebP 質量；PNG 保留透明，可能無法達標。

調整尺寸

平臺預設

寬度（px）

高度（px）

批次重新命名

本機處理記錄

0張

累計處理圖片

累計節省空間

僅統計此瀏覽器成功處理的任務；清除瀏覽器資料後會重置。

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