Восстановить PDF
Пересобирает повреждённый или несоответствующий PDF, перечитывая и переписывая его — восстанавливает файлы, которые не открываются в других приложениях.
"The file is damaged and could not be repaired" usually means the reader gave up, not that the document is gone. PDFs break in predictable ways — a truncated download, a cross-reference table that no longer matches the objects, a producer that wrote something not quite to spec — and in most of those cases the pages themselves are intact and merely unreachable. This tool re-parses the file, finds what is actually there, and writes a new, well-formed document around it.
It rebuilds structure; it cannot invent content. If the download stopped halfway then the last pages are genuinely not in the file, and no tool can recover bytes that were never received — expect to get back the part that arrived. Where a reader was simply refusing to open a structurally odd file, the rebuilt version usually opens everywhere.
How it works
- Drop in the damaged PDF.
- Let it be re-parsed and rewritten.
- Optionally also optimize it for fast web view.
- Download the rebuilt file and check what came back.
What people use it for
- Opening a file that one reader refuses and another shows partially.
- Recovering a document from an interrupted download or a failing drive.
- Fixing a PDF produced by a system that writes not-quite-conformant files.
Frequently asked questions
- Is my file uploaded to a server?
- No. The file is opened by JavaScript and WebAssembly running inside your own browser tab. It is never uploaded, there is no server-side processing and nothing is stored — closing the tab discards everything.
- Some pages are still missing.
- Then those pages are not in the file. Rebuilding recovers what is present and rewrites the structure around it; bytes that were never received or were overwritten cannot be reconstructed. Getting back most of a document is the realistic outcome for a truncated file.
- My PDF opens but behaves oddly. Is this the right tool?
- Often yes. A file that opens in one reader and not another, or that prints wrongly, is usually structurally non-conformant rather than damaged. Rewriting it produces a clean file that behaves consistently.
- Will anything be lost in the rebuild?
- Page content, annotations and structure are carried across. Anything that was already unreadable stays unreadable, and a few exotic features may not survive a rewrite — compare the rebuilt file against what you could see before.
- What is the web-view option?
- It also linearizes the result, so the first page renders before the whole file has downloaded. Worth turning on if the rebuilt document is going to be published; it makes no difference to a file kept locally.
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