Convert PNG to WebP
Keep the transparency, lose most of the file size.
ここに画像をドロップ
またはクリックして選択
対応形式: PNG
ローカルで処理します。画像が端末の外に出ることはありません。
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This is the conversion that gets overlooked. Everyone knows WebP beats JPEG for photos; fewer people realise it also beats PNG for graphics — with transparency intact and often at a fraction of the size.
For logos, icons, UI assets and cut-out product shots on a website, PNG to WebP is close to free performance. The alpha channel comes across, the visual result is the same, and the bytes drop sharply.
できること
Transparency is preserved
WebP supports full alpha, so nothing about the cut-out changes.
Substantially smaller
Graphics with flat colour and sharp edges often shrink dramatically compared to PNG.
Lossy or high-quality lossy
Pick a quality that suits the asset — high for logos with fine detail, lower for large decorative images.
Local conversion
Decoding and encoding both happen in your browser.
使い方
- 1
Load the PNG
Decoded with its alpha channel intact.
- 2
Set a quality
For sharp-edged graphics, keep it high — 90 or above — to avoid halos around edges.
- 3
Download the WebP
Ready to ship to a website.
KaiConvert を選ぶ理由
- ローカルツールはアップロード不要
- ページ読み込み後はオフラインでも動作
- クラウド AI は開始前に必ず明示