PDF Guides
How to Repair a Corrupted or Damaged PDF
A PDF can become corrupted from an interrupted download, a failed transfer, or an issue with the program that created it. When that happens, the file might not open at all, show blank or garbled pages, or trigger an error message in your PDF viewer.
Signs a PDF is corrupted
A corrupted PDF usually shows one of a few symptoms.
- The file won't open at all, or your viewer shows an error
- Pages appear blank or partially rendered
- Text or images look scrambled or missing
- The file size looks wrong compared to what you expected
How to repair a PDF
A repair tool attempts to rebuild the file's structure and recover as much readable content as possible.
- Upload the damaged PDF
- Run the repair process
- Review the recovered file
- Download the repaired version
When repair can't fully recover a file
Repair tools work by rebuilding what's structurally intact in the file. If the underlying data itself is missing or badly damaged — not just the file's structure — some content may not be recoverable. It's always worth trying, but if you have access to the original source, re-exporting the PDF from there is the most reliable fix.
Frequently asked questions
Can every corrupted PDF be repaired?
Not always — repair works by rebuilding the file's structure, so it recovers what's still structurally intact. Severely damaged files may only be partially recoverable.
Why did my PDF get corrupted in the first place?
Common causes include an interrupted download or upload, a failed file transfer, or an error in the software that generated the PDF.
Is it safe to try repairing an important document?
Yes — repairing works on a copy of the file's content and doesn't further damage the original, so it's worth attempting before assuming the file is a total loss.