How to use Repair PDF
- Select the damaged PDF.
- Click “Repair PDF”.
- Download the repaired copy.
Two-step recovery
First, bopdf uses qpdf to rebuild the file structure (cross-reference table and object streams) — this fixes most “file is damaged” errors losslessly. If that fails, it tries to render every readable page and rebuilds the PDF from those images.
Badly truncated files may lose their last pages; nothing can recover data that is missing from the file.
🔒 Your files never leave your device
bopdf processes your documents locally with JavaScript (pdf-lib and Mozilla pdf.js) inside your browser tab. Your PDF is never uploaded, stored or seen by us — you can even disconnect from the internet after the page loads and the tool keeps working. When you close the tab, everything is gone.
Frequently asked questions
Can every PDF be repaired?
No, only files with enough intact data.
Is it lossless?
Usually yes. If the fallback is used, pages become images.
Are my files uploaded to a server?
No. Everything happens in your browser on your own device. Files are never sent over the internet, which makes bopdf suitable for confidential documents.
Is there a file size limit?
There is no fixed limit, but very large files (hundreds of MB) depend on your device memory. On phones, files up to about 100 MB usually work well.