Why Merge PDF Files?
Merging PDFs is one of the most common document tasks. Whether you're combining a cover page with a resume, assembling a multi-chapter report, or consolidating invoices for accounting, having all your pages in a single PDF is cleaner and more professional than sending multiple files.
How to Merge PDFs in Your Browser (Free)
- Open the RoughTools PDF Merger
- Click "Add Files" or drag and drop your PDFs
- Rearrange the order by dragging the thumbnails
- Click "Merge PDF"
- Download the combined PDF instantly
Privacy note: Our merger runs entirely in your browser using PDF-lib. Your files are never uploaded to any server.
Can I Reorder Pages When Merging?
Yes. After adding your PDFs, you can drag them into the order you want before merging. If you need to reorder individual pages (not just whole files), use the Organize PDF tool after merging.
What's the File Size Limit?
Because the tool runs in your browser, the limit depends on your device's available RAM. In practice, most computers handle PDFs up to 200–500MB without issues. For very large PDFs (500MB+), consider compressing them first with our PDF Compressor.
Alternative Ways to Merge PDFs
| Method | Cost | Privacy | Speed | |---|---|---|---| | RoughTools (browser) | Free | Files stay local | Instant | | Adobe Acrobat | $14.99/month | Cloud upload | Fast | | Preview (Mac) | Free | Local | Instant | | PDFsam Basic | Free | Local app | Fast |