Image Convert
🔒ブラウザ内処理
Convert between JPG, PNG, and WebP entirely in your browser. Files are never sent to any server.
ファイルをドラッグ&ドロップ
またはクリックしてファイルを選択
Supported: JPG, PNG, WebP / Up to 20 files / Max 50MB per file
よくある質問
Are files really not uploaded?
Correct. Open DevTools (F12) → Network tab. No upload occurs.
PNG → JPG: what happens to transparency?
JPG does not support transparency, so transparent areas become white.
Why use WebP?
WebP is typically 25–35% smaller than JPG at equal quality. Great for the web.
JPG vs PNG?
JPG for photos and gradients; PNG for logos, illustrations, screenshots, or anything that needs transparency.
When is WebP best?
For website images. ~30% smaller than JPG at the same quality, helping page speed.
Are there file limits?
Up to 50MB per file, up to 20 files at once.