PDF Repair
Tries to recover broken or unopenable PDF files. Two repair tiers: a fast standard repair and a more aggressive deep rebuild.
What it does
Your PDF reader refuses to open the file, says "file corrupted", or freezes on certain pages. This tool tries to fix the internal damage. Useful for half-finished scans, files that came down from the internet incomplete, or documents salvaged from old drives.
How to use
- Drag the broken PDFs into the list.
- Pick a repair mode: Standard Repair or Deep Reconstruction.
- Click Run.
You get one repaired PDF per input. The original is left untouched.
Repair modes
| Mode | When to use |
|---|---|
| Standard Repair | Always try this first. Fixes broken index tables, missing trailers and metadata errors. Enough for most files. |
| Deep Reconstruction | Try this if Standard did not work. Rebuilds the page structure and broken content streams from scratch. Slower but recovers more files. |
Examples
Report that will not open: Add the broken PDF, pick Standard Repair, run. Try to open the output, if it works you are done.
Standard failed: Re-add the same PDF, pick Deep Reconstruction this time. The structure is rebuilt from scratch and usually works.
Files salvaged from an old drive: Add 50 PDFs in batch, run Standard mode. Check which ones open. Re-run the failures through Deep mode.
Half-downloaded scan: Add the file, Standard mode, run. The missing trailer is usually patched and the file opens.
Watch out
- Not every corruption is recoverable. Severe damage may produce blank pages or lose content.
- The repaired file may be smaller, because unsalvageable parts were dropped.
- Deep reconstruction takes longer and uses more RAM.
- Encrypted broken files are harder to repair. Unlock them first if possible.
- Clear All does not confirm, it wipes the list instantly.
License
Free tier has a monthly repair cap. Office plan removes it.