PDF Merger
What is a PDF Merger?
Merge and combine multiple PDF files into a single unified PDF document directly inside your web browser. Re-order files with drag-and-drop controls and download the combined PDF.
Why Use This Tool?
- Document Consolidation: Combine separate PDF reports, invoices, or scanned pages into one file.
- Job Application Files: Merge cover letter, resume, and certificates into a single PDF.
- 100% Local Privacy: Confidential PDF documents are merged locally using PDF-Lib—zero server uploads.
How to Use
- Upload two or more PDF files.
- Re-order PDF files using up/down arrow buttons.
- Click "Merge PDFs" to download the merged PDF file.
Real Working Example
Input:
Files: Resume.pdf (1 page) + CoverLetter.pdf (1 page)
Output Result:
Merged File: Combined_Document.pdf (2 pages)
Important Technical Details & Features
- PDF-Lib Browser Engine: Uses PDF-Lib WebAssembly engine to copy and merge PDF page streams locally.
- Drag-and-Drop Reordering: Arrange PDF file sequence before merging.
- Zero Server Latency: Merging executes in browser memory.
Related Editors, Design & Media Tools
- PDF Splitter: Extract page ranges from PDFs.
- Images to PDF: Convert images to PDF.
- PDF Text Extractor: Extract text from PDFs.
Frequently Asked Questions
Are my confidential PDF documents uploaded to an external server?
No, PDF merging runs 100% locally on your browser using WebAssembly PDF-Lib.
Can I change the order of PDF files before merging?
Yes, use up/down buttons or drag-and-drop controls to arrange file sequence before combining.
Is there a limit on the number of PDF files I can merge?
There is no hard file count limit—performance depends on your local computer memory.
Does merging preserve original vector graphics and fonts?
Yes, original PDF pages, text vectors, and embedded fonts are preserved intact.
Can I merge password-protected encrypted PDFs?
PDFs must be unlocked or decrypted before merging.