Free PDF Merger - Combine Multiple PDFs Online
Why Choose Our PDF Merger?
Powered by pypdf, supporting PDF 1.4-2.0 standards. Drag-and-drop reordering, preserves bookmarks and metadata. All processing happens in your browser locally — files never leave your device.
How to Use the PDF Merger
1. Upload multiple PDF files (drag to reorder)
2. Adjust merge order by dragging
3. Choose whether to preserve bookmarks/metadata
4. Click 'Merge PDFs'
5. Download merged PDF
Frequently Asked Questions
Will bookmarks be preserved after merging?
Yes. All bookmarks are preserved and merged into a unified bookmark tree in the new PDF. You can also disable this.
How many PDFs can I merge at once?
Up to 100 PDFs per session, max 50MB each. Total size recommended under 500MB for best performance.
Are my PDF files secure?
All processing is local in your browser. Files never leave your device and are cleared when you close the page.
Do you support encrypted PDFs?
Not currently. Please decrypt password-protected PDFs before uploading.