Repair PDF

Recover mildly corrupted PDFs locally by rebuilding their structure and validating the output before download.

Options

Output filename control.

Best-effort byte cleanup around the PDF header and EOF marker.

Cross-reference rebuild through a fresh PDF save.

Readable-output validation before download.

How to repair a PDF

  1. Upload PDF — Upload one damaged or suspicious PDF.
  2. Run repair — Run the local repair attempt.
  3. Review notes — Review the recovered page count, attempts, and repair notes.
  4. Download — Download the rebuilt PDF if the output validates successfully.

FAQ

Are my PDFs uploaded?
No. Repair attempts run in your browser.
Can every broken PDF be fixed?
No. If the browser cannot recover readable pages and validate the rebuilt output, the tool shows a plain failure message.
Does repair change the document?
The visible pages are preserved where the parser can read them, but the file structure is rewritten to refresh cross-reference tables.