Last updated: March 2026
Merge PDF Files Online
Combine multiple PDFs into a single document — free, private, no file uploads.
Ready to merge your PDFs? Your files never leave your device.
Open Merge PDF Tool →How to Merge PDF Files
- Select files: Drag and drop PDF files or click to browse. Add as many files as you need.
- Reorder: Drag files to arrange them in the order you want.
- Merge: Click "Merge PDFs" and your combined document downloads instantly.
🔒 No file uploads. Your PDFs are combined directly in your browser using JavaScript. Nothing is sent to any server.
Why Merge PDFs with ClientPDF?
- 100% private: Files never leave your device — no uploads, ever
- No limits: Merge as many files as you want, as many times as you want
- No account: No signup, no email, no login required
- Instant: No waiting for uploads/downloads — processing happens locally
- Works offline: Once the page loads, you can merge PDFs without an internet connection
Common Use Cases
- Combining scanned pages into a single document
- Merging multiple reports or invoices
- Assembling a portfolio or application package
- Joining chapters of a book or manual
- Consolidating contracts and attachments
Frequently Asked Questions
Is there a limit on how many PDFs I can merge?
No. You can merge as many PDF files as you need. Since processing happens in your browser, the only limit is your device's memory.
Are my files uploaded to a server?
No. ClientPDF processes files entirely in your browser. Your PDFs never leave your device and are never sent over the internet.
Can I reorder pages before merging?
Yes. You can drag and drop files to set the order before merging. For more granular control, use the Reorder PDF Pages tool after merging.