Repair Corrupted or Damaged PDF Files Online

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Repairing Your PDF

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How to Fix a Corrupted PDF

PDF files can become corrupted during download, transfer, or when the application that created them crashes mid-save. Common symptoms include error messages when opening, blank pages, or missing content. This tool automatically detects and repairs the most frequent causes of PDF corruption.

How to Repair a PDF Online

  1. Upload your damaged PDF using the file picker above.
  2. The tool rewrites the file structure, fixing issues such as broken cross-reference tables, invalid object references, and malformed structure.
  3. Click Repair PDF to fix detected problems and download the recovered document.

What Can Be Repaired?

The repair engine rewrites the document to fix corrupted cross-reference tables, improper EOF markers, and invalid object or page-tree structures. Files that the PDF engine cannot open at all cannot be recovered — always keep the original file as a backup.

After repair, use Analyze PDF to verify the document structure, or linearize the repaired file if you plan to host it online.

About PDF Repair

This tool attempts to fix corrupted or damaged PDF files:

  • Repairs damaged file structure
  • Recovers readable content
  • Fixes cross-reference tables
  • Restores document properties
Illustration representing PDF repair
Tip: While this tool can fix many common structural problems, files too damaged for the PDF engine to open cannot be recovered.
Tips for Best Results
  • Try repairing the file multiple times if needed
  • Check if document is password-protected before repair
  • Some repair operations may simplify complex formatting
  • Keep your original file as a backup
  • Files too damaged for the PDF engine to open cannot be repaired
Frequently Asked Questions

Upload your damaged PDF to this tool and click Repair PDF. The tool rewrites your document's internal structure, fixing common issues such as broken cross-reference tables, invalid object references, and malformed structure. No installation required.

This tool can fix corrupted cross-reference tables, improper EOF markers, and invalid object or page-tree structures by rewriting the document. Files that are too damaged for the PDF engine to open at all cannot be recovered.

The repair process aims to preserve all original content. In some cases, complex formatting may be simplified to ensure the document can be opened, but readable text and images are retained wherever possible.

Processed on ISO 27001-certified UK servers.

Files are encrypted in transit and automatically deleted.

Learn more