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.

無料オンライン画像圧縮 — アップロード不要

クリック、ドラッグまたは貼り付け

Maximum 20 images at a time

詳細設定

目標サイズ よく使う上限を選ぶか、下で入力

カスタム上限（KB、任意）

出力形式

空欄で通常圧縮。1 KB = 1000 バイト。目標指定時の JPEG/WebP 品質は選択した戦略に従います。PNG は透明度を保持するため、目標を超える場合があります。

サイズ変更

プラットフォームプリセット

幅（px）

高さ（px）

まとめてリネーム

ImgMin Pro 累計処理数

25,700+

処理された画像

51 GB+

保存されたスペース

このブラウザで完了した処理を含む時間ベースの推定値であり、サーバー全体の集計ではありません。

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