PDF Merger
Combine multiple PDF files into one
This free online pdf merger runs in your browser and is part of our PDF Tools collection.
PDF Merger
Combine multiple PDF files into one document
Select multiple PDF files to merge (Ctrl/Cmd + Click)
How to Use
- Click "Select PDF Files" and choose multiple PDFs (Ctrl/Cmd + Click)
- Drag files to reorder them in the list
- Click "Merge PDFs" to combine them into one file
- The merged PDF will download automatically
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Instant In-Browser Execution
Runs locally in JavaScript without wait times or server delays.
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100% Privacy & Security
Your inputs and files are never stored or logged on remote servers.
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Cross-Device Responsive
Fully optimized for mobile smartphones, tablets, and desktop displays.
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100% Free Forever
No subscription fees, no signups, and no software installations.
How to Use the Online PDF Merger
1
Select PDF Documents
Click "Select PDF Files" or drag multiple PDF files into the upload zone (hold Ctrl or Cmd to multi-select).
2
Reorder Document Sequence
Drag and drop files in the uploaded list to arrange them in the exact order you want them merged.
3
Review File Names & Pages
Verify individual file names, page counts, and sizes in the interactive list.
4
Merge & Download
Click "Merge PDFs" to assemble the combined PDF in your browser memory and trigger an automatic file download.
Frequently Asked Questions
Common questions about using this free online pdf merger.
Is there a limit on how many PDF files I can merge? ▾
There is no artificial file count limit. Because processing executes directly in your browser using WebAssembly and PDF-Lib, merging dozens of files depends only on your device's available RAM.
Are my private PDF documents uploaded to an external server? ▾
No. Merging occurs 100% client-side in your web browser. Your contracts, invoices, and personal documents never leave your computer.
Will merging preserve form fields, bookmarks, and links? ▾
Standard vector graphics, text layers, embedded fonts, and page content are preserved. Complex interactive XFA forms are flattened into static printable PDF format.
Can I merge password-protected PDF files? ▾
Encrypted or password-locked PDFs must first have their security restrictions removed before they can be merged into a new document.
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