📦 一括圧縮
複数の画像を一括圧縮 — すべてブラウザ内で完了
🔒 画像がデバイスの外に出ることはありません。 すべての処理はbrowser-image-compression (Web Worker)を使用してブラウザ内でローカルに行われます。アップロード、サーバー、追跡は一切ありません。
特長
- Bulk Processing — 圧縮 dozens of images simultaneously with a single click.
- Size Report — See a detailed table of original vs. compressed sizes for every file.
- 品質 Control — Adjust compression quality from 10% to 100% for the entire batch.
- すべてダウンロード — ダウンロード all compressed images at once.
仕組み
- Drop multiple images — Select or drag multiple PNG, JPG, or WebP images.
- Set quality — Adjust the compression quality slider.
- 圧縮 & download — Click 圧縮 All, then download all results.
活用例
- Optimize all images on a website for faster loading
- Shrink photos before attaching to emails
- Reduce photo library size for mobile storage
よくある質問
How many images can I compress at once?
There's no hard limit — it depends on your device's memory. 50-100 images works well on most devices.
Is the quality loss noticeable?
At 80% quality, the difference is virtually invisible. File sizes typically drop 50-80%.