Free PDF Merger
Merge multiple PDF files into one document instantly. Drag and drop to reorder files before merging.
Why Choose ThinPDF for PDF Merging?
The best free online PDF merger with drag-and-drop reordering
100% Secure
All files are automatically deleted after 10 minutes. No data collection or storage.
Easy Reordering
Drag and drop files to arrange them in the exact order you want before merging.
Lightning Fast
Merge multiple PDF files in seconds with our optimized processing engine.
Completely Free
No hidden fees, subscriptions, or registration required. Always free to use.
Works Everywhere
Compatible with all devices and browsers. No software installation needed.
Quality Preserved
Maintains all formatting, images, and structure in your merged PDF document.
How to Merge PDF Files Online
- Upload PDF files: Click "Choose files" or drag and drop multiple PDF files into the upload area (minimum 2 files required).
- Reorder files (optional): Drag and drop files in the list to arrange them in your desired merge order.
- Start merge: Click the "Merge PDFs" button to combine your files into one document.
- Download result: Once merging is complete, download your merged PDF file.
About PDF Merging
Merging PDF files combines multiple documents into a single PDF. This is useful for consolidating reports, combining invoices, merging chapters of a book, or creating comprehensive documents from multiple sources. Our PDF merger preserves all formatting, images, and document structure, ensuring your merged PDF looks exactly as intended.