Merge PDF Files — Private & Fast
Combine multiple PDF documents into a single file. Reorder PDFs, preview file names, and download the merged PDF — all in your browser. No uploads unless you explicitly use cloud storage.
Client-side merging
All processing runs in your browser. Your files stay on your device unless you choose to share them.
Reorder documents
Place files in the exact order you want them to appear in the final PDF.
Fast & reliable
Merging is quick for normal-sized files and suitable for desktop and mobile.
No sign-up
Use the tool without creating an account for occasional merges.
How to merge PDFs
- Drag & drop PDF files into the area on the right (or click to choose files).
- Use the up / down buttons to reorder files as you need.
- Click Merge PDFs to download the combined document.
Tip: For very large jobs, merge in batches to avoid browser memory limits.
Comparison — Otoolz Merge vs Typical online services
| Feature | Otoolz | Typical Online Service |
|---|---|---|
| Client-side processing | Yes | Often server-side |
| Drag & drop | Yes | Yes |
| Reorder files | Yes | Yes |
| Cloud import (Drive/Dropbox) | No (by default) | Often available |
Frequently asked questions
- Will my files be uploaded to a server?
- Not by default. Merging runs in your browser and files are not uploaded to our servers. If you explicitly choose a cloud import option (not available by default), you are sharing files with that provider.
- What if a PDF is password protected?
- Password-protected PDFs cannot be merged unless unlocked first. Unlock them with a tool that you trust before using this merge tool.
- How many files can I merge at once?
- This depends on your device and browser memory. For very large batches, merge in smaller groups to avoid performance issues.