“Fall seven times, stand up eight.”
Repair PDF Online
Rebuild a PDF whose internal structure is damaged — the file that opens with "there was an error" or shows blank pages — by re-parsing it leniently and writing a clean, consistent copy.
- No sign-up, no watermark
- Files encrypted and auto-deleted
- No installation — runs right in your browser
- Fast processing on desktop and mobile
Read our full guide: How to Repair a Corrupted or Damaged PDF File →
How to use Repair PDF online
- 1
Upload your files
Drag and drop or click to select your file(s). Uploads go directly to encrypted cloud storage over HTTPS. (PDF)
- 2
Run the tool: Repair PDF
Processing happens instantly in the cloud — no software to install, works on Windows, Mac, Linux, iOS and Android.
- 3
Download the result
Get your processed file via a secure temporary link. All files are deleted automatically about a day after upload.
Frequently asked questions
What kind of damage can actually be repaired?
Structural damage: broken cross-reference tables, malformed trailers, bad object offsets, and the truncation you get from an interrupted download or a failed transfer. The file is parsed with a tolerant reader that reconstructs the object index, then written back out cleanly.
Can it recover content that isn't in the file?
No, and this is the honest limit. If pages were never fully written — a download that stopped at 40%, a file truncated by a full disk — the missing bytes are simply gone. Repair reconstructs the structure around what survived; it cannot invent pages that were never transferred.
What does it mean if repair fails?
You'll get "This file is too damaged to repair automatically." That means even the tolerant parser couldn't find a usable document structure — usually the file is severely truncated, isn't really a PDF, or is encrypted with a password (try Unlock PDF first if you have it).
Should I try this before giving up on a file?
Yes — it's free, takes seconds, and never modifies your original. A surprising share of "corrupted" PDFs are structurally broken but content-intact, and a rewrite is all they need.
How do I know the repair actually worked?
Open the result and check the page count matches what you expect, then jump to the last page rather than only the first. A file that opens is not proof it is complete: repair rebuilds the index around whatever objects survived, so a document missing its final pages can still open perfectly at page one.