Fix Broken or Unreadable
PDFs Instantly

Common PDF problems we see

These are the most frequent causes of PDFs that won't open or display incorrectly.

What can be recovered vs what cannot

We are honest about what's possible. Browser-based recovery has real limits.

What recovery looks like

How PDF recovery works

A 5-step process running entirely in your browser.

Privacy-first recovery

Most online PDF repair tools upload your files to a server. We don't.

Frequently asked questions about PDF recovery

Everything you need to know about fixing broken PDFs.

• Why won't my PDF open?+
  PDFs fail to open for several reasons: damaged file structure from an incomplete download, broken cross-reference tables, invalid object references, corrupted metadata, or file corruption during transfer. The PDF Recovery Mode in our Cleanup PDF tool can fix most structural issues without uploading your file.
• Can corrupted PDFs be recovered?+
  Mildly damaged PDFs can often be recovered when the issue relates to structural corruption rather than missing binary data. Recovery is possible for broken cross-reference tables, invalid object references, missing EOF markers, and malformed metadata. Recovery is not possible when file data itself is missing or truncated.
• Does FastPrivatePDF upload my files?+
  No. All PDF recovery processing happens entirely in your browser using JavaScript and the open-source pdf-lib library. Your file never leaves your device — no upload, no server processing, no data collection. You can verify this by opening your browser's Network tab and observing that no file transfer occurs during recovery.
• Can password-protected PDFs be repaired?+
  Password-protected PDFs cannot be recovered without the correct password. If you have the password, unlock the PDF first using your PDF reader, then use the recovery tool on the unlocked version. Bypassing encryption is not supported and is not legal.
• What types of PDF damage can be fixed?+
  The recovery tool can fix: broken cross-reference (xref) tables, invalid PDF object references, missing EOF markers, malformed PDF structure, and partially broken metadata. These are the most common causes of PDFs that won't open in standard readers like Adobe Acrobat, Preview, or Chrome.
• Can fully corrupted PDFs be restored?+
  No. If the PDF's binary data is missing or the file has been truncated, recovery is not possible. The data that was lost cannot be recreated. Recovery only works when the file structure is broken but the content data is still physically present in the file.
• Is PDF recovery safe?+
  Yes. Recovery happens entirely in your browser using the open-source pdf-lib library. Your file is never uploaded or transmitted anywhere. The process is equivalent to opening a file in any local desktop application — completely private.
• Why do PDFs become corrupted?+
  PDFs become corrupted due to: interrupted downloads (most common), damaged storage devices such as SD cards or USB drives, incomplete file transfers over email or messaging apps, failed exports from PDF creation software, file system errors during saving, and physical disk damage.
• Can I recover PDFs on my phone?+
  Yes. The recovery tool works on modern mobile browsers including Safari on iPhone and Chrome on Android. Upload directly from your Files app, email attachment, or WhatsApp. No app download required.
• Will the recovered PDF look exactly the same?+
  Not always. Recovery rebuilds the PDF structure but some content — particularly embedded images, fonts, or pages that referenced corrupted data — may still be missing or partially damaged in the output. The recovery report shows exactly which pages were fully recovered and which had issues, so you know exactly what was and wasn't saved.

Related PDF tools

Other tools that work with difficult or damaged PDFs.