Merge PDF Files
Combine multiple PDFs into a single document. All processing happens in your browser — no uploads, no tracking, completely private. Merge PDF files offline in seconds and download a single consolidated PDF with no watermarks.
Merge PDFs
Maximum 20 files • 50MB per file
Private & Secure
All processing happens locally in your browser. No files are uploaded to any server.
How to Use
1. Add PDFs
Click the drop zone or drag and drop PDF files (up to 20 files, 50MB each).
2. Reorder (Optional)
Drag files to change their order in the final merged PDF.
3. Merge
Click "Merge PDFs" and your merged file will download automatically as "merged.pdf".
4. Filename
You can specify the output filename below. We recommend keeping the .pdf extension.
Features
Multiple Files
Merge up to 20 PDF files at once, with a maximum of 50MB per file for optimal performance.
Drag to Reorder
Easily reorder your PDFs by dragging and dropping them into the desired sequence.
Fast Processing
Lightning-fast merging powered by pdf-lib. Most operations complete in seconds.
Private
All merging happens in your browser. Your PDFs never leave your device.
No Watermarks
Get clean PDFs with no watermarks, no ads, and no signup required.
Error Handling
Encrypted PDFs are automatically skipped with detailed error messages.
Filename
Specify a custom output filename for the merged PDF before downloading.
Common Use Cases
Business
- •Combine contracts and legal documents
- •Merge invoices and financial statements
- •Consolidate reports and presentations
- •Create complete proposal packages
Personal
- •Combine scanned documents and forms
- •Merge research papers and materials
- •Create application packages
- •Organize portfolios and albums
Your Privacy is Protected
This tool runs entirely in your browser using the pdf-lib library. Your PDFs are never uploaded to any server, stored, or transmitted over the internet. All merging happens locally on your device.