Will repairing change how the document looks?

No. The pages are carried through unchanged; only the file structure around them is rewritten.

The repair failed. Is my document lost?

Not necessarily, but this tool cannot recover it. Damage severe enough to defeat a structural rebuild usually needs the original source.

Repair a damaged PDF — in your browser

Repair a damaged PDF

A file that one program opens and another rejects, usually because something was added before or after the document during a download or by a mail gateway. Rebuilding the file structure removes the noise and produces something every reader accepts.

or drop a file anywhere on this panel

opened locally · 0 bytes sent

How it works

01Open the damaged PDF.
02Leave rebuilding switched on.
03Export the repaired file.

What it can fix

Junk added before the file header or after the trailer — the usual result of a truncated download, a doubled file, or a gateway prepending text. The page content itself is untouched; only the scaffolding around it is rewritten.

What it cannot fix

A destroyed cross-reference table cannot always be rebuilt. When that happens the file is reported as damaged rather than exported broken — a file that silently fails to open later would be worse than an honest refusal now.

Questions

Will repairing change how the document looks?: No. The pages are carried through unchanged; only the file structure around them is rewritten.
The repair failed. Is my document lost?: Not necessarily, but this tool cannot recover it. Damage severe enough to defeat a structural rebuild usually needs the original source.