WebP 可以保留透明背景，因此帶有 alpha 的 PNG 並非必然要維持為 PNG。更安全的做法是轉換一份副本，在明亮與黑暗背景上預覽邊緣，並在替換原始檔之前比較最終檔案大小。
使用 PNG to WebP Converter 進行瀏覽器端轉換。當瀏覽器匯出 WebP 副本時，您的檔案會保留在您的裝置上。
可靠的作業流程
- 從您擁有的最大且乾淨的 PNG 來源開始。
- 以適中的品質設定（例如 82%）轉換為 WebP。
- 在棋盤格、明亮背景和黑暗背景上預覽 WebP。
- 與原始 PNG 比較檔案大小。
- 保留 PNG 來源檔以便編輯，並在 WebP 更小且視覺乾淨時發布。
需要檢查的項目
仔細觀察半透明陰影、抗鋸齒文字、圓角標誌邊緣和微小圖示。這些區域會比圖像其餘部分更早出現匯出問題。
PNG 可能仍然更好的情況
PNG 對於非常小的圖示、簡單的扁平圖稿，或需要無損編輯的工作流程可能更好。WebP 通常在較大的圖形、螢幕截圖和圖像繁多的頁面中佔優。
常見問題
WebP 可以有透明背景嗎？
可以。WebP 支援 alpha 透明度，但您應在轉換後預覽邊緣與陰影。
標誌是否總是應該從 PNG 轉換為 WebP？
不一定。請先測試檔案大小和視覺品質，尤其是小型扁平標誌。
Resources
參考資源
利用這些參考資源，在指南、對應的支援頁面與內容製作者之間切換。
Convert between JPG, PNG, and WebP formats in your browser.
開啟工具PNG to WebP ConverterConvert PNG images to smaller WebP files in your browser.
開啟工具WebP to PNG ConverterTurn WebP files into PNG images when an upload form needs PNG.
開啟工具PNG vs WebP vs AVIF：該用哪種圖片格式？針對網站圖片、透明背景、螢幕截圖、照片與瀏覽器支援，實用比較 PNG、WebP 與 AVIF。
閱讀指南什麼是 WebP？什麼時候應該使用它？以初學者友善的方式說明 WebP，介紹它適用的情境，以及 PNG 或 JPG 何時仍是更好的格式。
閱讀指南Leon PatelCreates how-to guides and photo tips that keep the advice simple, clear, and ready to use in Gift Studio.
查看作者Dylan RossChecks guides and photo tips for freshness, usefulness, and a calm editorial voice.
查看審閱者開啟 Gift StudioApply the guide in the editor when you are ready to make the gift.
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Keep exploring 如何在不失去透明度的情況下將 PNG 轉換為 WebP
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