Repair PDF
Rebuild the cross-reference table of a damaged PDF so it opens again.
PDF documents Client-side pdf-lib object scan + structural rewrite
Tool preview
How to use it
- 01
Drop the broken PDF.
- 02
The object structure is scanned and rebuilt.
- 03
Download the repaired file.
Limitations
- ! It repairs structure, not content: damaged streams or missing pages cannot be recovered.
- ! Encrypted files are refused — decrypt them first so the repair cannot silently strip protection.
- ! A file too damaged to parse at all is reported instead of producing an empty PDF.
FAQ
What does repair actually do?
A PDF keeps an index of every object. When that index is wrong, readers refuse the file. The repair scans the objects, rebuilds the index and writes a new, consistent file.
Will the layout change?
No, pages and objects are copied as they are; only the file structure is rewritten.
Is the PDF uploaded?
No.
Files never leave your device
Processing happens in your browser using the File API, WebAssembly and Web Workers. There is no upload endpoint.
Technical details
- Processing
- Client-side
- Implementation
- pdf-lib object scan + structural rewrite
- Category
- PDF documents
- Network requests
- None while processing