Repair a Damaged or Corrupt PDF
Attempt to salvage a damaged or partially corrupted PDF and rebuild a clean version that opens correctly in modern viewers.
Repair PDF
Attempt to fix a damaged PDF by rebuilding it
About the Repair PDF tool
The repair tool re-parses the PDF, rebuilds the internal object index and re-writes a valid document structure. It can recover files that show ‘corrupt’ or ‘couldn't open’ errors.
Not every corruption is recoverable, but this is often the fastest first attempt — and it runs privately in your browser.
Key features of Repair PDF
- Rebuilds broken PDF object tables
- Recovers many ‘couldn't open’ errors
- Works on files with missing or malformed metadata
- Local processing — no upload of possibly sensitive data
- Free, unlimited, watermark-free
How to use Repair PDF
- Upload the damaged PDF.
- Click ‘Repair PDF’.
- Download the repaired file and try to open it.
Common use cases
- Recover PDFs that fail to open
- Fix truncated downloads
- Restore files damaged by faulty USB transfers
- Salvage documents from crashed apps
- Rebuild broken invoices before archiving
Frequently asked questions
What if repair doesn't work?
Some PDFs are damaged beyond what an in-browser tool can recover. In that case, ask the original sender for a fresh copy or try a dedicated forensic tool.
Is the repaired PDF safe to open?
The repaired file only contains structure rebuilt from your original bytes — no external content is added.
Is this tool safe to use with confidential files?
Yes. Every file is processed locally inside your web browser using JavaScript and WebAssembly. Nothing is uploaded to a server, stored, or shared — so contracts, invoices, medical records and personal documents stay 100% private on your device.
Is it really free? Are there any limits or watermarks?
Yes, it's completely free with no sign-up, no daily limits, and no watermarks stamped on your output. Process a single file or hundreds — the only limit is your device's memory.