PNG 壓縮在圖片為純色、銳利邊緣、文字或透明時效果最好。如果 PNG 其實是照片或大型截圖，轉成 WebP 通常比硬要把 PNG 再壓縮更省空間。
想快速測試，可用 PNG to WebP Converter 轉換一份副本並比較結果。
先從尺寸開始
一張寬 3000 像素的 PNG 用在 900 像素的版面裡是在浪費檔案大小。先把圖片調整到實際顯示尺寸，再進行壓縮或轉換。
選擇合適的格式
透明來源檔與清晰編輯請保留 PNG。當 WebP 能產生更小結果且目的地支援時，網站發佈圖片請使用 WebP。
保留原始檔
請務必把原始 PNG 存放在安全的地方。網站匯出檔是交付檔，不該是你唯一可編輯的副本。
常見問題
為什麼我的 PNG 壓縮後還是很大？
PNG 預設為無損壓縮，因此照片與漸層通常不會變小，除非你縮減尺寸或轉換為 WebP 之類的格式。
PNG 壓縮會降低畫質嗎？
無損 PNG 壓縮會讓像素完全一致。其他流程可能減少色彩或尺寸，進而改變圖片。
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 PNG images to smaller WebP files in your browser.
開啟工具Image CompressorCompress JPG, PNG, and WebP images locally with quality controls.
開啟工具如何將圖片壓縮到 500KB使用瀏覽器工具，將 JPG、PNG 或 WebP 圖片縮減到如 500KB 這類目標檔案大小的實用流程。
閱讀指南如何在不失去透明度的情況下將 PNG 轉換為 WebP實用指南：將透明 PNG 圖形轉換為 WebP，同時檢查 alpha 邊緣、預覽結果，並避免常見的匯出錯誤。
閱讀指南為什麼 PNG 檔案這麼大？了解 PNG 檔案為何會變得龐大、PNG 何時仍是合適的格式，以及 WebP 或 JPG 何時更適合網站傳輸。
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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