Repair PDF — Fix Corrupted PDFs Free
Recover damaged, truncated, or corrupted PDF files. Rebuild broken cross-reference tables and restore unreadable PDFs. No signup.
MergeAny combines two or more JPG, JPEG, or PNG images into a single file directly in your browser — vertically, horizontally, or in a grid. There is no upload limit, no watermark, and your files are deleted from our servers seconds after merging. Works on Windows, Mac, iPhone, and Android with no install and no signup.
How to Repair a Corrupted PDF
Upload Your Corrupted PDF
Select the damaged PDF file up to 50 MB. Even partially unreadable files can be uploaded.
Repair Runs
pypdf reads the file with strict mode disabled, reconstructs the page tree, and rewrites a clean PDF.
Download Repaired PDF
Click Repair PDF and save the recovered, clean PDF file.
What Causes PDF Corruption?
PDF corruption most commonly happens during file transfer or download. If a download is interrupted — due to a network drop, browser crash, or timeout — the file may be truncated: it has all the beginning content but is cut off partway through. This breaks the PDF's cross-reference table, which normal viewers need to navigate the file.
Other causes include storage media errors (corrupted sectors on a hard drive or USB drive), improper PDF creation by third-party tools, file conversion errors, and email transfer issues that modify the binary content of the attachment.
What this tool cannot fix: If the file header is completely overwritten (the file is not recognized as a PDF at all), if page content streams are missing entirely, or if the file was encrypted with a lost password. In those cases, the original source — the application or system that created the PDF — is the only recovery option.
PDF Repair Features
Recover corrupted PDFs and restore readable content.
Non-Strict PDF Reading
The repair process reads the PDF with error tolerance enabled, recovering data that strict parsers would reject.
Fixes Common Corruption
Repairs broken xref tables, truncated files from partial downloads, minor stream errors, and encoding issues.
Reconstructed Page Tree
The output is a freshly written PDF with a clean page tree — ready to open in any viewer.
Private Processing
Files are processed in isolated server memory and deleted immediately after download.
Content Preserved
All pages that can be successfully read are preserved in the repaired output.
Browser-Based
No installation required. Works on any device and operating system.