What is Repair PDF?
Repair PDF is a free browser-based PDF tool powered by PDF-lib. Your documents are processed entirely in your browser and never sent to any server. Works with any standard PDF file. No Adobe Acrobat or software installation needed.
This tool lets you fix and recover corrupted or damaged pdf files without installing any software or creating an account. Everything runs directly in your browser for maximum privacy. Your files and data never leave your device.
Use it for quick tasks at any time from any device — desktop, tablet or mobile. No subscription, no ads, no limits.
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Instant results
No server processing or wait
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100% private
Files stay on your device
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Always free
No subscription or fees
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Mobile ready
Works on any device
How to use Repair PDF
- Upload your corrupted or damaged PDF file
- The repair engine scans the file structure for broken cross-references and truncation
- Processing runs locally — no file is sent to any server
- Download the repaired PDF if recovery was successful
Why use OnlineToolsPlus?
PDF tools on OnlineToolsPlus use PDF-lib — a JavaScript PDF engine that runs locally in your browser. Your documents are never uploaded to a server, which means no privacy risk for sensitive contracts, financial documents or personal files. With 25+ free PDF tools covering merging, splitting, compressing, editing and converting, you have a complete PDF toolkit at no cost.
Frequently asked questions
What types of damage can this tool fix?
The tool attempts to recover PDFs with broken structure, truncated files, cross-reference table errors, and other common corruption types. It cannot recover content that was never written to the file.
What causes PDF corruption?
Incomplete downloads, interrupted transfers, failed email attachments, bad storage sectors, software crashes during saving, and file system errors are all common causes.
What if the repair does not work?
If the file is severely corrupted, recovery may be partial or impossible. Try opening it in a different PDF reader first, as some readers are more tolerant of minor corruption than others. Adobe Reader, Chrome, and Foxit all have slightly different tolerance for damaged files.
Will the repaired PDF look exactly like the original?
If repair is successful, the content should be intact. In some corruption cases, specific pages or elements may be missing or altered if that data was genuinely lost.
Is my PDF uploaded to a server?
No. Processing runs locally in your browser.
Can this recover a corrupted encrypted PDF?
If the PDF is both corrupted and encrypted, the corruption needs to be resolved first. If the encryption data itself is corrupted, recovery may not be possible.
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Last updated: April 11, 2026
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