优化 PDF 以加快在线加载速度
重新组织 PDF 结构,让第一页立即显示,而不必等待整个文件下载完成。
工作原理
1. 上传你的 PDF。2. 我们会重新组织其内部结构以支持渐进式加载。3. 下载优化后的文件。
“快速网页视图”到底是什么意思?
线性化后的 PDF 可以让浏览器在下载到足够的数据后立即显示第一页,而不必等待整个文件下载完毕——在网速较慢的情况下打开较大的 PDF 时,这种效果最为明显。
这会改变 PDF 的外观或缩小文件大小吗?
不会——内容完全相同,文件大小也基本不变。此操作只是调整文件内部的字节顺序以加快渐进式加载,并不是压缩(如需压缩,请使用“压缩 PDF”工具)。
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.