You double-click the PDF. Your reader says "file is damaged". The sender insists they sent it intact. The deadline is in two hours.
Corrupted PDFs are recoverable more often than you'd think. The damage is usually at the file's metadata, not the actual content.
Try a different reader first
Different PDF readers tolerate different kinds of damage. If Adobe says it's broken, try Chrome's built-in viewer, Preview on Mac, or Firefox. Often one reader opens it where another fails.
No install, no risk. If any reader opens the file, you can re-save it to a clean version.
Re-render via print to PDF
If a reader can display the file (even with warnings), use Print to PDF to re-render it. The output is a fresh PDF without the corrupted metadata.
You lose form fields and some interactive elements this way. Plain content survives.
Try PDF repair tools
Specialised repair tools exist for badly damaged files. They scan the file structure, identify intact content streams, and rebuild a valid PDF around them.
Results vary — sometimes you get the whole document back, sometimes just a few pages. Worth a try when nothing else works.
Last resort: ask for a re-send
If the file is truly broken, the sender's original may still be fine. Ask for a fresh copy. Email transit sometimes corrupts attachments; a re-send often works.
For next time: keep an original copy of any critical document. A corrupted file with no backup is the worst case.
FAQ
Why do PDFs get corrupted?
Interrupted downloads, email transit issues, faulty saves, disk errors, or buggy software that generated the file. Almost always preventable with a re-send.
Can I recover form data from a damaged file?
Sometimes. Form data is stored separately from page content; recovery tools can sometimes extract it even when pages won't render.
Should I trust a recovered file?
Verify the content matches what you expected. Recovery sometimes succeeds visually but introduces subtle errors. For contracts or financial documents, double-check key values.
Will repair work on password-protected PDFs?
Unlock first if you have the password. Repair tools generally can't bypass encryption.
A corrupted PDF isn't always a lost PDF. Try alternative readers first, then re-save through Flint for a clean version.