Repair PDF
Recover damaged, corrupt, or unreadable PDF files using structural recovery routines. Rebuild cross-reference tables and recover accessible objects entirely within your browser.
Your files never leave your device. All processing happens locally in your browser with no file uploads or account required.
How to use repair pdf
- 01
Select damaged PDF
Choose the corrupt or unreadable PDF document you want to repair.
- 02
Run structural recovery
Allow local qpdf WebAssembly routines to rebuild document cross-references and recover readable objects.
- 03
Download recovered PDF
Review the reconstructed pages and save the repaired PDF file to your device.
Important details & limitations
qpdf attempts structural recovery and rewrites readable objects. Missing content cannot be recreated. Review recovered pages; a clean rewrite does not guarantee all original content survived.
Frequently asked questions
What should I know before using repair pdf?+
qpdf attempts structural recovery and rewrites readable objects. Missing content cannot be recreated. Review recovered pages; a clean rewrite does not guarantee all original content survived.
Where are my files processed?+
All document contents remain on your device. Browser JavaScript and WebAssembly perform the work; no files are sent to a conversion service.
What files does repair pdf support?+
Use unencrypted PDFs; Unlock PDF can first remove encryption using a known password. Up to 100 MB total. Malformed, unusually large, or complex PDFs may exceed browser limits. Editing a signed PDF changes the document and can invalidate its signature.