當你需要工具支援更廣泛的格式，或需要更小、更適合瀏覽器的檔案用於網站時，將 AVIF 檔案轉換為 WebP。
一切都在你的瀏覽器中完成，因此你的圖片保持私密。
如何使用此工具
新增你的 AVIF
將你的 AVIF 檔案拖曳到工具上，或從你的電腦中選擇它。
已預先選取 WebP
輸出格式已是 WebP。如有需要可調整品質。
比較並下載
預覽結果，然後下載你的 WebP。
本節目前僅提供英文版本。
Converting backwards, and why you sometimes need to
AVIF gives the smallest files, but WebP is the safer format in practice: it has broader support, especially on slightly older browsers and in older image editing tools, and it is accepted by more content management systems and upload forms.
Moving from AVIF to WebP means re-encoding an already-lossy image, so a little quality is lost. You also lose the size advantage — expect the WebP to be larger than the AVIF it came from, sometimes by 20–40%.
When this conversion is the right call
- A CMS or upload form rejects AVIF but accepts WebP — still a very common restriction.
- You need to edit the image, and your editor does not open AVIF.
- You are standardising a mixed library on one format, and WebP is the one with the fewest compatibility surprises.
When it is not
If the image is already live on a page and the browser support is fine, leave it as AVIF. Converting to WebP only makes the file bigger. Reach for this conversion when something downstream refuses AVIF, not as a general tidy-up.
常見問題
為什麼要把 AVIF 轉成 WebP？
WebP 在較舊的瀏覽器以及許多尚未支援 AVIF 的工具和平台中擁有更廣泛的支援。
WebP 的品質好嗎？
是的 — 在合理的品質設定下，對大多數圖片而言，WebP 與來源在視覺上沒有區別。
它是私密的嗎？
是的。圖片在本地處理，永遠不會被上傳。