Combine PDF files into one
Drop your PDF files, drag them into the order you want, and click Merge. You get one PDF with every page back to back. The merge runs in your browser, so nothing is uploaded, there is no file-count limit, and no account is needed. Handy for a loan packet, a job application, or tax paperwork.
- ✅ Free
- 🔒 No sign-up
- 📱 Works on mobile
- ⚡ Instant results
🔒 Everything runs in your browser. Your data and files never leave your device.
How to merge PDF files in 3 steps
Merging copies every page of each file, one file after another, into a new document. Nothing is recompressed, so text stays selectable and images keep their original quality.
- Add your PDFs by dragging them in or using the button. Each file shows a thumbnail of its first page and its page count.
- Reorder by dragging a row up or down. On a phone, use the ↑ and ↓ arrows.
- Merge and download. The file downloads automatically when it is ready.
\[ \text{merged page count} = \text{pages in file} \ 1 + \text{pages in file} \ 2 + \ldots + \text{pages in file} \ n \]
File size and limits
The merged file is roughly the sum of the originals, minus a few KB when fonts or images are shared. If the total is too big to email, run the result through the Compress PDF tool.
| Packet | Files | Pages | Total size |
|---|---|---|---|
| Rental application | 5 | 14 | 6.8 MB |
| Job application (resume, cover letter, transcripts) | 4 | 9 | 3.1 MB |
| Quarterly receipts | 12 | 12 | 2.4 MB |
Password-protected PDFs can't be merged as they are. The tool tells you so and points you to the unlock tool.
When merging PDFs is useful
- Applications: one file for a photo ID, proof of address, and a W-2 when the portal accepts a single upload.
- School: combine a report, its appendices, and the cover page.
- Bookkeeping: bundle a month of invoices before sending them to your accountant.
- Scans: join phone photos you converted with the JPG to PDF tool.
3 real-life examples
A rental application packet
You have 5 PDFs: photo ID (1 page), three pay stubs (3 pages), tax return (2 pages), offer letter (4 pages), and bank statement (1 page). Ordered the way the landlord asks, the result has \( 1 + 3 + 2 + 4 + 1 = \) 11 pages in one file.
A report with appendices
A 1-page cover, a 24-page report, and two appendices of 6 and 8 pages. After merging: \( 1 + 24 + 6 + 8 = \) 39 pages. You can split the file afterwards if you only need the appendices.
Twelve receipts before emailing
Twelve one-page receipts at 200 KB each add up to 2.4 MB. The merged PDF is about 2.4 MB for 12 pages, which fits easily under a 10 MB email limit.