画質を落とさない画像圧縮（ロスレス）
1ピクセルも劣化させずに画像を最小化。印刷物やデザインデータにも安心。
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
Pixel-identical output
Lossless algorithms keep every pixel value identical, safe for print and design work.
Redundant metadata stripped
EXIF and camera data that does not affect display are removed, often saving meaningful space.
Optimise again
Running an already-compressed image through another pass can shrink it further.
活用シーン
Design deliverables
Assets sent to designers or printers must stay pixel-perfect, so lossless is the safe choice.
Squeezing already-optimised files
When an image still exceeds a limit, lossless compression trims it further without visible change.
よくある質問
How is lossless different from regular compression?
Regular compression discards details your eyes cannot see in exchange for smaller files. Lossless compression keeps every pixel, so the savings are smaller but quality is untouched.
How small can it get?
It depends on the source. Images that were already lossily compressed usually shrink another 5–20%. Original high-quality assets have more room.