Repair Corrupted or Damaged PDF Files Online

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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 analyses the file structure and identifies issues such as broken cross-reference tables, invalid object references, and malformed content streams.
    3. Click Repair PDF to fix detected problems and download the recovered document.

    What Can Be Repaired?

    The repair engine can fix corrupted cross-reference tables, missing or damaged metadata, improper EOF markers, broken font references, and invalid page tree structures. For severely damaged files, partial content recovery is usually possible — 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 our repair tool can fix many common PDF issues, severely damaged files may only be partially recoverable.
    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
    • For heavily damaged files, recovery might be partial
    Frequently Asked Questions

    Upload your damaged PDF to this tool and click Repair PDF. The tool automatically detects and fixes common issues such as broken cross-reference tables, invalid object references, and malformed content streams with no installation required.

    This tool can fix corrupted cross-reference tables, missing metadata, improper EOF markers, broken font references, and damaged page tree structures. Severely damaged files may only be partially recoverable.

    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