PNG画像をオンラインで無料JPG変換。登録不要。一括変換対応。高速ブラウザツール。 この無料のオンラインツールは、登録もソフトウェアのインストールも不要です。ブラウザで開くだけですぐに使えます。結果は迅速かつ安全に処理され、すべてのデータはお使いのデバイスで直接処理されます。
PNG to JPG 変換
PNG画像をオンラインで無料JPG変換。登録不要。一括変換対応。高速ブラウザツール。
PNG to JPG 変換の使い方
Upload PNG Images
Drag and drop or click to select one or more PNG images.
Adjust JPG Quality
Set the desired JPG quality (80-95% recommended). Higher quality = larger file size.
Convert to JPG
Click convert. Each PNG is processed in your browser and converted to JPG instantly.
Download JPG Files
Download each JPG individually or get a ZIP archive with all converted files.
いつ使う？
Reduce File Size
PNG files are often large. Converting to JPG shrinks them by 50-80% for faster uploads.
Website Photos
JPG is the standard for web photos. Convert PNG screenshots or graphics to JPG for web use.
Email Attachments
Many email services have attachment limits. JPG helps fit images within size constraints.
詳細情報
PNG to JPG Technical Details
PNG uses lossless compression and supports transparency. JPG uses lossy compression which discards some data to achieve smaller file sizes. When converting PNG to JPG, transparency is replaced with a white background. Quality slider controls compression level: 100 = minimal compression, 1 = maximum compression.
よくある質問
A: JPG is a lossy format, so some quality loss is expected. However, at 90-95% quality, the difference is usually invisible to the human eye. PNG is better for graphics with text or sharp edges.
A: PNG transparency is converted to a white background in JPG. If you need transparency, keep the PNG format or convert to WEBP instead.
A: Yes. Upload multiple PNG files and they will all be converted to JPG simultaneously. You can download them individually or as a ZIP archive.
A: No hard limit, but very large images (50+ MB) may cause browser performance issues. We recommend images under 20 MB for best results.