画像サイズの一括変更
幅・高さ・短辺・プリセットから選んで一括リサイズ。比率維持と切り抜きにも対応。
対応フォーマット：JPG/JPEG/PNG/WEBP/GIF/SVG/AVIF/HEIC/HEIF
画像をドラッグ＆ドロップ — すべて端末内で処理されます
機能
Four scaling modes
Scale by width, height, short edge or fixed size, or crop to an exact ratio.
Useful presets
Includes common sizes for social avatars, store product shots and ID photos.
Uniform batch resizing
Apply one setting to every image, handy when specs must match exactly.
活用シーン
Platform size limits
Each platform enforces its own dimensions; resizing avoids rejected uploads.
Web performance
Scaling to the display size cuts page weight and improves load times.
よくある質問
Will resizing blur my images?
Proportional downscaling uses high-quality resampling and is usually indistinguishable from the original. Upscaling loses detail, so shrinking is recommended.
Can I resize without compressing?
Yes. Resize on its own, and set quality to 100% (lossless) to change pixel dimensions while keeping every detail.