What it does
PDF Repair attempts to recover a corrupted PDF by rebuilding its internal structure so it opens again.
- Rebuilds structure
How do I repair a corrupted PDF?
Repair a damaged PDF by uploading it; the tool rebuilds the file structure — the cross-reference table and object streams — to recover readable pages and content where possible, then lets you download the fixed file. It works in your browser, so nothing is uploaded.
- Rebuilds cross-reference tables and structure
- Recovers readable pages where possible
- Attempts to fix "cannot open" errors
- 100% client-side
What is
PDF Repair
A tool that attempts to recover a corrupted or unreadable PDF by rebuilding its internal structure so viewers can open it again.
PDF Tools
Related terms
recoverycorrupted file
Frequently Asked Questions
It attempts recovery.
It rebuilds the structure to recover as much readable content as possible, though severely damaged files may only partially recover.
Where intact.
Content whose data survives is retained; unrecoverable objects may be dropped.
No.
Repair is attempted locally in your browser.
Detailed Explanation
How it works
The tool re-parses the file, reconstructs the cross-reference table and object relationships, and re-serialises a valid PDF with pdf-lib where content survives.
- Xref + object rebuild
Use cases
Reopen files that throw errors, recover documents after an interrupted download or transfer, and salvage readable pages.
- Fix open errors
Limitations
Recovery is best-effort; content whose underlying bytes are lost cannot be restored, and heavily damaged files may only partially recover.
- Best-effort recovery
Privacy
Repair runs in the browser; the file is not uploaded.
- 100% local