Attempt to recover a damaged, corrupted, or "won't open" PDF by rebuilding it page-by-page into a fresh, valid file.
How It Works
How Repair PDF Works
The tool uses FPDI to open the source file and read its page structure. Rather than trying to fix the file in place, it walks through the document page by page, importing each one as a template into a brand-new PDF.
Pages that are readable are copied across intact, preserving their original size and orientation; if an individual page's internal structure is too corrupted to import, that specific page is skipped and logged, while the rest of the document continues to be recovered.
The response reports exactly how many pages were successfully recovered versus how many failed, so you know upfront whether the repair was complete or partial before you rely on the output file.
Worked Example
See It In Action
A 40-page PDF that throws an "invalid file structure" error in most PDF readers, but has damage isolated to a handful of pages, can be repaired to recover 37 of 40 pages cleanly, with the 3 unreadable pages reported separately so you know they need to be re-sourced.
FAQ
Frequently Asked Questions
Will this always fully fix my PDF?
Not always — repair works by re-importing whatever page structure it can still read. If a page's internal data is too severely damaged, that page is skipped rather than guessed at, and the response tells you exactly which pages were recovered.
What kinds of PDF problems does this fix?
It's effective against structural corruption — broken cross-reference tables, incomplete downloads, or truncated files — that prevents a PDF from opening normally, since rebuilding the page objects from scratch bypasses the damaged parts of the file.
Can this repair a password-protected PDF?
No — the file needs to be readable without a password first. Use the Unlock PDF tool beforehand if the damaged file is also encrypted.
What's the file size limit for repair?
Up to 100 MB per file, which is higher than most other tools here since damaged PDFs sometimes carry extra bloat from the corruption itself.
