File Corrupted or Unreadable — Repair & Recover Your Data
Windows or macOS says your file is corrupted or unreadable? The data may still be recoverable. This guide covers the causes of file corruption and the repair methods for PDF, Word, Excel, JPG, MP4, and ZIP files.
Step-by-Step Guide
- Identify the file type and corruption symptoms — Determine which format is corrupted: Word/docx (won't open), PDF (errors on open), JPG/image (black areas or can't display), Excel/xlsx (repair message on open), MP4/video (won't play), ZIP archive (extraction error).
- Try opening in a different application — Word files: try LibreOffice or Google Docs. PDF: try Adobe Reader, Preview (Mac), or Chrome's built-in PDF viewer. ZIP: try 7-Zip with "Extract with full paths." Different apps handle corruption differently.
- Restore from a backup or version history — Check Windows Previous Versions (right-click the file → Properties → Previous Versions), Mac Time Machine, or cloud version history (OneDrive, Google Drive, Dropbox all keep previous versions).
- Run SafeRestore's file repair on the corrupted file — Open SafeRestore, switch to the File Repair mode, and load the corrupted file. SafeRestore attempts to rebuild the file header, reconstruct the internal structure, and extract readable content.
Frequently Asked Questions
What causes file corruption?
File corruption is caused by: interrupted writes (power failure during save), bad sectors on the storage drive, malware, incomplete downloads, improper file transfer (USB unplugged during copy), and storage media failure (failing hard drive or SD card).
Can SafeRestore fix a Word document that says "File format is not valid"?
Yes in many cases. SafeRestore's Word repair mode reads the raw binary structure of the .docx file and attempts to reconstruct a valid file container. Most text content can be recovered even from heavily corrupted Word files.
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