修复损坏的 PDF
修复无法打开或在其他应用中显示异常的 PDF。
工作原理
1. 上传损坏的 PDF。2. 我们重建其内部结构。3. 下载修复后的文件。
它能修复哪些问题？
常见的结构性问题——例如损坏的交叉引用表、被截断或格式错误的文件，或其他导致 PDF 无法正常打开的内部损坏。它无法恢复文件中确实缺失的页面或内容。
如果文件无法修复怎么办？
你会看到一条错误提示，而不是一个仍然打不开的文件——有些损坏过于严重，无法修复。
Why did my PDF get corrupted in the first place?
Usually it's not something you did. The most common causes are a download or file transfer that got cut off partway through, a cloud sync (Google Drive, OneDrive, WhatsApp) that didn't finish writing the file, or whatever program created it crashing before it finished saving. Any of those can leave the file's internal structure incomplete even though most of the actual content is still in there.
Is a PDF that asks for a password the same problem?
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Does repairing change how the PDF looks or what's in it?
No. It only touches the file's internal structure — things like the cross-reference table that tells a reader where each page and object lives — not the actual content. Text, images, and layout come through as they were; nothing gets recompressed, rasterized, or flattened in the process.
What can I try if the repair doesn't work?
A few things worth trying before giving up on the file: open it in a different PDF reader in case the problem is the viewer rather than the file, go back to wherever you got it and download or export it again — the copy you have may be the one that got cut off — or ask whoever sent it for a fresh copy. If none of that helps, the damage is likely too deep for any tool, ours included, to reconstruct.