Attempt to fix a damaged or corrupt PDF that will not open correctly, rebuilding it into a valid, readable file.
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Accepted: PDF
This fixes common corruption like broken cross-reference tables or truncated files by rebuilding the PDF's internal structure. It cannot recover content that was destroyed beyond recovery — if the file is too damaged, you'll get a clear error instead of a fake "repaired" download.
Upload a PDF that will not open correctly or shows errors, and we attempt to rebuild it into a valid file by reopening and rewriting its internal structure. Some corruption is too severe to fix — if that happens, you get a clear error instead of a fake "repaired" file.
Damaged PDFs usually have a broken index (the cross-reference table that tells a reader where each object is), a truncated end after an interrupted download, or malformed object streams. Repair reopens the file with a tolerant parser and writes a clean, valid PDF from whatever it can recover.
It cannot restore data that is not in the file. If a download stopped halfway, the missing pages are not there to recover, so try downloading the original again.
No — this fixes common issues like broken cross-reference tables or truncated files, but severely damaged or non-PDF content cannot be recovered, and you will get a clear error rather than a fake success.
No, it rebuilds the file structure so a valid PDF can be opened again; it cannot restore content that was never in the file or was destroyed beyond recovery.