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Repair PDF

Recover what can be read from a damaged PDF.

Recovery, not magic. This re-parses the file loosely and rebuilds a clean document from whatever pages survive. It fixes broken cross-reference tables, stray bytes and malformed objects. It cannot invent data that is genuinely missing — if a page’s content was lost before you got the file, no tool will bring it back.

Drop the damaged PDF

Repaired on your device · nothing is uploaded

No file yet

Add a PDF that will not open and DO101 will try to rebuild it from what it can read.

Private by design. This tool runs entirely in your browser. Your file is processed on your own device and is not uploaded by DO101.

About the Repair PDF

Re-parses a broken file loosely and rebuilds a clean document from every page that survives. It fixes damaged cross-reference tables, stray bytes and malformed objects — and tells you honestly how many pages it managed to recover.

How to use it

  1. 1Add the PDF that will not open.
  2. 2DO101 attempts to re-parse and rebuild it.
  3. 3Check every recovered page before relying on it.

What you get

  • Rebuilds a clean document from readable pages
  • Reports how many of the original pages survived
  • Fixes broken cross-reference tables and stray bytes
  • Explains clearly when a file is beyond recovery
  • Runs on your device

Frequently asked questions

Can it recover a page whose content is missing?

No. If the data was lost before the file reached you — a truncated download is the usual cause — there is nothing to rebuild from. No tool can invent it, and this one says so rather than pretending.

What kinds of damage can it fix?

Broken cross-reference tables, stray bytes appended by a bad transfer, and malformed objects that make strict readers refuse the file. Those are the common causes of "this PDF cannot be opened".

My PDF is password-protected and will not repair.

Remove the password with the Unlock tool first, then repair the result. Repairing an encrypted file without decrypting it would produce unreadable output.

Keep going

People who use this tool usually reach for these next.

Unlock PDFRuns in your browser

Remove a password or restrictions from your own PDF.

Compress PDFRuns in your browser

Make a PDF smaller, with an honest choice about the trade-off.

Merge PDFRuns in your browser

Combine several PDFs into one, in the order you choose.

Organize PDFRuns in your browser

See every page and drag, rotate or delete it.