Repair PDF
Fix corrupted or damaged PDF files.
Your file is ready. Click download to save the output.
How to Repair PDF in 4 Steps
Fix corrupted or damaged PDF files.
1
Upload PDF
Select your damaged PDF file.
2
Automatic Repair
We detect and fix issues automatically.
3
Process
We repair the file instantly.
4
Download
Save your repaired PDF.
FAQ
Common questions about repairing PDFs.
Corrupted structure, missing pages, and formatting issues can often be repaired.
Not all damage can be fixed; severely corrupted files may not be recoverable.
We attempt to preserve all recoverable content and structure.
Most common PDF issues are successfully repaired.
About PDF Repair
What is PDF Repair?
PDF repair fixes corrupted or damaged PDF files by rebuilding file structure, recovering readable data, and reconstructing broken references. Our advanced algorithms attempt to salvage as much content as possible from problematic PDFs.
Common PDF Problems
- Corrupt Headers: Damaged file identification data
- Broken References: Missing or invalid object links
- Incomplete Downloads: Truncated or partial files
- Invalid Structures: Malformed PDF syntax
Repair Process
Multi-step recovery approach:
- Structure Analysis: Identify corruption points
- Data Recovery: Extract readable content
- Reference Rebuild: Reconstruct internal links
- Validation: Ensure repaired file integrity
Prevention Tips
Keep backups, complete downloads fully, avoid sudden power loss during saves, and use reliable storage devices to prevent PDF corruption.
Frequently Asked Questions
PDFs can corrupt due to incomplete downloads, storage device errors, malware, improper file transfers, or issues during creation. Power failures during save operations are also common causes.
Most PDFs with minor corruption can be repaired. However, severely damaged files with missing data sections may only be partially recoverable. Success depends on the extent of corruption.
Our repair tool preserves as much original content as possible. Minor corruption is fixed without data loss. Severely corrupted sections may be removed if unrecoverable.
Common signs include error messages when opening, missing pages, garbled text, images not displaying, or the PDF reader crashing. Some files may not open at all.
Success rate is approximately 80-90% for common corruption issues like broken references, invalid headers, or incomplete files. Severely fragmented files may have lower success rates.
Try repair first as it is faster and preserves original formatting. If repair fails or results are unsatisfactory, recreating from source documents may be necessary.