Repair Corrupted PDF File Online Free
Repair and recover corrupted or damaged PDF files online for free. Our PDF repair engine rebuilds broken PDF structure and recovers your content.
Drop file here or browse
Maximum file size: 50 MB
A corrupted PDF that refuses to open or displays garbled content can be frustrating — especially when it contains important documents. CocoPDF's PDF repair tool uses a robust, server-side PDF engine to reprocess your damaged PDF from scratch, reconstructing a valid PDF from whatever valid content can be recovered.
The engine reads the PDF even when it has structural errors, recovers the valid content objects it can find, and writes a new, clean PDF file. This approach successfully fixes the most common corruption types: incomplete downloads, corrupted cross-reference tables, invalid object references, and truncated file endings.
To repair a corrupted PDF file online free, upload your PDF and click Process. If the content can be recovered, your repaired PDF downloads immediately. Severely corrupted files with no recoverable content cannot be fixed by any tool. Files are deleted within one hour and no watermarks are added.
How to Repair PDF Online — 3 Simple Steps
- 1
Upload your file
Drag and drop your file onto the upload box, or click to browse. CocoPDF accepts a file up to 50 MB each.
- 2
Adjust the settings
Choose the options you need for Repair PDF. The default settings work well for most documents.
- 3
Download the PDF file
Click the process button. The file is generated on our server and your PDF download starts automatically.
Frequently Asked Questions
What types of PDF corruption can this tool fix?
The tool reprocesses the PDF from scratch, which fixes many common issues: incomplete downloads, cross-reference table errors, invalid object references, and truncated streams. Severely corrupted files with no valid content cannot be recovered.
Why did my PDF get corrupted?
Common causes include incomplete downloads, email attachment corruption, storage device errors, incomplete saves during a power outage, or bugs in the software that generated the PDF.
What if repair does not work?
If the PDF is too severely corrupted, it cannot be recovered. In that case, try restoring from a backup copy or contact the source of the document for a fresh copy.
Does repair change the content of the PDF?
No. The engine reprocesses and re-outputs the same content. Correctly-formed content elements are preserved; invalid or missing objects may be omitted if they cannot be recovered.