Repair PDF
Repair corrupted or damaged PDF files online. Recovers unreadable documents and fixes structure errors — free, private, no upload required, runs in your browser.
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How it works
Upload
Drag and drop your PDF file — or click to browse.
Process
Your browser handles everything locally. Zero server contact.
Download
Instantly save the result. No watermarks, no limits.
Why use Repair PDF?
Privacy First
Your files never leave your device. No server contact, ever.
100% Browser-Based
Everything runs locally using JavaScript — works offline too.
Instant Results
No queue, no waiting. Files are processed in seconds.
Completely Free
No account, no plan, no watermarks. Free, always.
Step-by-step guide
Select your file
Click the upload area or drag a PDF file from your desktop into the tool above.
Process in your browser
The tool processes your file entirely inside your browser using JavaScript. Nothing is sent to a server.
Download PDF
Once done, your file downloads instantly. No sign-up, no waiting, no watermarks.
How to Repair a PDF
- Upload your corrupted PDF (up to 100 MB).
- Our tool analyses the internal cross-reference table (xref) and attempts to rebuild any broken object pointers.
- Download the repaired file.
Frequently asked questions
Our Repair PDF tool is most effective against missing or broken cross-reference tables, which covers the vast majority of real-world corruption cases (interrupted downloads, application crashes during save). It cannot recover files where the content body itself has been physically overwritten or zeroed.
Adobe Reader's built-in repair is basic. Our tool attempts a deeper reconstruction of the PDF structure — rebuilding the cross-reference table from scratch and recovering embedded objects. Try uploading the file even if Reader has already failed to repair it.
Encryption can sometimes mask structural errors. The repair tool will attempt to process the file, but if it is encrypted with AES-256 and you do not have the password, the underlying content remains inaccessible even after structural repair.
PDF viewers have different tolerances for structural errors. Adobe Reader is strict; Chrome's built-in viewer and some mobile apps are more lenient and will display a malformed PDF anyway. If the file opens in one viewer but not another, it has structural issues that our repair tool can correct to make it universally compatible.
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Open toolProblems this solves
- PDF Always Opens on the Wrong Page
Every time you open a PDF it jumps to a specific page instead of the beginning, because an initial view page number is embedded in the file.
- PDF Cannot Be Edited — Content Is Locked
When you try to edit a PDF, all editing tools are greyed out or disabled — the document has editing restrictions applied.
- PDF File Corrupted or Damaged
Your PDF opens with errors, shows garbled content, or refuses to open entirely.
- PDF Has Blank Pages When Converted From Word
When you export a Word document to PDF, some or all pages appear blank in the resulting PDF.
- PDF Is Password Protected — Cannot Open
A PDF requires a password you do not have, cannot remember, or were never given.
Learn more
- Why PDF Files Get Corrupted: Causes, Diagnosis & Recovery
A deep dive into the root causes of PDF corruption, how to diagnose a damaged file, and the best recovery strategies — from free tools to version history.
- How to Fix Sideways or Upside-Down PDF Pages
A PDF with rotated pages is a surprisingly common problem — especially with scanned documents. Here is how to fix it permanently, not just in your viewer.
- How to Convert PDF Pages to JPG Images
Converting a PDF to JPG images is straightforward, but the DPI setting determines whether your output is crisp or blurry. This guide explains everything you need to know.
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