Why Merge PDFs?
Combining PDFs saves time and keeps documents organized. The key question: cloud vs local processing for privacy.
Local vs Cloud
| Feature | Local (Allin PDF) | Cloud |
|---|---|---|
| Upload | No | Yes |
| Privacy | Files stay on device | Stored 1-24h on servers |
| Speed | 1-3 seconds | Depends on upload |
| Bookmarks | Preserved | Varies |
| Offline | Yes | No |
Step-by-Step
- Open merge tool — No account needed.
- Add files — Drag and drop multiple PDFs.
- Reorder — Drag into preferred order.
- Click Merge — Locally in 1-5 seconds.
- Download — Bookmarks and links preserved.
File Size Tip: Merging 10 PDFs (45MB total) often produces 35-40MB output due to duplicate font consolidation.
Preserving Structure
- Retaining bookmarks from each source file
- Updating internal links
- Preserving form fields
- Maintaining metadata
FAQ
File limit?
Up to 20 files in free tier. 5MB free, 50MB Pro.
Quality reduced?
No. Merging is lossless — no re-encoding.
Password-protected PDFs?
Unlock first with the password, then merge.