PDF Merge
Merge multiple PDF files into one document instantly. Reorder files before merging. All processing happens in your browser — your files never leave your device.
Drop your PDF files here, or click to browse
Select multiple PDF files to merge
How to Merge PDF Files
- 1
Upload PDF Files
Select two or more PDF files you want to combine.
- 2
Arrange Order
Drag and drop to reorder the PDF files in your desired sequence.
- 3
Merge Documents
Click Merge to combine all PDFs into a single document.
- 4
Download Merged PDF
Download the combined PDF file.
About PDF Merging
PDF merging combines multiple PDF documents into a single file while preserving the content, formatting, and links of each source document. This is essential for creating comprehensive reports, combining contracts, or assembling document packages.
The merging process uses the pdf-lib library to parse and combine PDFs entirely in your browser. Unlike online services, your sensitive documents never leave your device — there are no server uploads or third-party access.
Each source PDF is appended sequentially in your specified order. The merged document retains all pages, images, text formatting, and bookmarks from the original files.
Key Features
Common Use Cases
- •Combine multiple contract sections into a single PDF for signing
- •Merge scanned documents into a complete file for archiving
- •Assemble report sections from different team members
- •Combine invoice PDFs for batch submission or record-keeping
- •Create comprehensive document packages for legal or real estate transactions
Frequently Asked Questions
Is there a limit on how many PDFs I can merge?
No. You can merge as many PDFs as your device's memory allows. Most devices can handle combining 50+ standard PDFs without issues.
Are bookmarks and links preserved?
Page content, formatting, and embedded links are preserved. Internal bookmarks may need to be recreated since page numbering changes in the merged document.
Can I merge password-protected PDFs?
No. PDFs must be unlocked before merging. Remove password protection first, then merge the unprotected files.
Does merging change the quality of the PDFs?
No. Merging is a lossless operation — pages are combined without re-encoding, so there is zero quality loss in text, images, or vector graphics.