最佳化 PDF 以加快網頁載入速度
重新編排 PDF 的內部結構,讓第一頁立即顯示,不必等待整個檔案下載完成。
運作方式
1. 上傳您的 PDF。2. 我們會重新編排其內部結構以支援漸進式載入。3. 下載最佳化後的檔案。
「網頁快速顯示」實際上是什麼意思?
經過線性化的 PDF,能讓瀏覽器在檔案下載到足夠的內容時就立即顯示第一頁,不必等整個檔案下載完成——在網路速度較慢時開啟大型 PDF,效果最為明顯。
這會改變 PDF 的外觀或縮小檔案大小嗎?
不會——內容完全相同,檔案大小也大致不變。這只會改變內部的位元組排列順序,以加快漸進式載入速度,並不是壓縮(如需壓縮,請使用「壓縮 PDF」)。
How do I check that a PDF is actually linearized?
Open the file's Properties in Adobe Acrobat or Preview — the Description tab will show "Fast Web View: Yes." No PDF reader handy? Open the file in a plain text editor and look near the very top for /Linearized — that's the marker every linearized file starts with.
Will I notice a difference, or does this only matter for websites?
It only matters when the PDF streams over the web — opened straight from a link, viewed inside a browser tab, or embedded on a page. If someone already has the whole file sitting on their disk before they open it, there's nothing left to speed up. This tool is for PDFs people view online, not ones they've already downloaded.