If a PDF won't open properly or shows errors in your viewer, repairing it rebuilds the file's internal structure.
Use This Tool — Free ↗Choose the file that's giving you trouble.
The file's internal structure is cleaned and reconstructed.
Your PDF, working again.
PDFs can become damaged from an interrupted download, a failed save, or being generated by buggy software — the result is a file that won't open, shows a blank page, or triggers an error in your viewer.
Repairing rebuilds the file's structure so the content underneath, which is often still intact, can be read normally again.
Common causes include interrupted downloads, incomplete saves, or the file being generated by software that produced invalid PDF structure.
It resolves most structural issues, but a file with severely damaged or missing content can't always be fully recovered.
No, repairing only rebuilds the file's internal structure — it does not alter the visible content.
Yes — completely free, with no sign-up and no watermark.