Image Resizer (Batch)
Resize up to 50 images at once — by percent, width, height or exact size
Both dimensions are applied as given — the aspect ratio is not preserved.
Never uploaded — Everything runs in your browser — your images never leave your device.
使い方
- 1
Drop up to 50 images — each shows its dimensions and size.
- 2
Pick a resize mode: percentage, target width/height, or exact pixels — with format and quality if you want them.
- 3
Process the whole batch and download files individually or as one ZIP.
選ばれる理由
プライバシー重視
入力は安全に処理され、販売されません。クライアント側ツールはブラウザから一切出ません。
すぐ・無料
インストール不要、待ち時間なし。あらゆる端末のブラウザで数秒で結果。
ずっと無料
登録不要・透かしなし・回数無制限。クライアント側ツールはすべて好きなだけ使えます。
よくある質問
Will resizing reduce my image quality?⌄
Downscaling uses high-quality smoothing and generally looks great. Upscaling beyond 100% cannot invent detail — it gets softer the further you go. The quality slider controls JPEG/WebP compression on export.
What does exact mode do differently?⌄
Percentage/width/height modes always preserve the aspect ratio, so nothing looks stretched. Exact mode applies both dimensions literally — useful for thumbnails or fixed slots, but it can distort the picture.
Are my photos uploaded to a server?⌄
No. Decoding, resizing and re-encoding all happen in your browser with the canvas API. Files never leave your device.