Merge PDF
Combine multiple PDFs into a single file. Reorder before merging. Works entirely in your browser — files never leave your device.
Merge PDF files online — free and private
Combining PDFs into one document is one of the most common PDF tasks. Whether you're consolidating receipts, stitching together exam papers, or merging contract pages, you shouldn't have to upload sensitive files to a server just to get it done.
This tool uses your browser's own processing power — built on WebAssembly-level performance — to merge any number of PDFs locally. Add files, drag them into the order you want, and download the combined PDF in seconds.
What you can do
- Merge unlimited PDFs — no file count or size cap
- Reorder pages by moving files up or down
- Preserve bookmarks, hyperlinks, and form fields
- 100% client-side — nothing is uploaded
How to use this tool
- Click the drop zone and select two or more PDF files (or drag them in).
- Use the up/down arrows to arrange them in the order you want.
- Click Merge & Download. The combined PDF will be saved to your device.
Frequently asked questions
Is my PDF uploaded to a server?
No. All merging happens in your browser using JavaScript. Your files never leave your device.
Is there a file size or count limit?
The only limit is your device's memory. Most laptops can handle hundreds of pages without trouble.
Can I merge password-protected PDFs?
Not directly. Use our Unlock PDF tool first to remove the password (if you know it), then merge.
Does this work on mobile?
Yes. The tool is fully responsive and works on iPhone, Android, iPad, and any modern browser.
Will the quality change after merging?
No. Pages are copied byte-for-byte — images, fonts, and vectors are preserved exactly.