大多数在线 PDF 工具要求你提供文件，以便将文件发送到某个地方。而我要求提供文件是为了能够打开它。编辑引擎在此标签页中运行：你的 PDF 文件就像任何程序读取你打开的文件一样被读取，没有任何内容被发送到服务器——因此不存在需要随后删除的远程副本，因为根本就没有创建副本。这也意味着没有上传限制，也没有每日配额；唯一的限制是你的设备本身。我在页面的 Guides 下详细写了这篇文章：“如何在不上传文件的情况下编辑 PDF”。📄
Most online PDF tools ask for your file so they can send it somewhere. I ask for it so I can open it. The editing engine runs in this tab: your PDF is read the way any program reads a file you opened, and nothing is posted to a server — there is no copy on the other end to delete afterwards, because one was never made. It also means no upload limit and no daily quota; the boundary is your own machine. I wrote this one down in full, under Guides on my page: "How to edit a PDF without uploading your file". 📄
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