PDF Tools
Combine multiple PDF documents into one file, arrange their order and download the finished PDF directly from your browser.
Drop your PDF files here
Add two or more PDF documents, then arrange them before merging.
Choose PDF Files
Your PDF files are processed in your browser. The files are not uploaded to a ComfortSkillz server.
Your selected PDF files will appear here.
PDF merged successfully
Download Merged PDF
What this PDF merger does
Combine files
Join multiple PDF documents into one file.
Reorder documents
Move files up or down before creating the final PDF.
Keep original pages
Pages are copied into the new PDF without image conversion.
Local processing
PDF processing happens inside the browser.
Instant download
Save the merged document directly to your device.
No account required
Open the tool and merge your documents without registration.
Large or unusually complex PDF files can require more browser memory. Password-protected or malformed PDFs might fail to load.
More ComfortSkillz tools
How to merge PDF files
- Click Choose PDF Files and select two or more PDF documents.
- Review the files in the order they will appear.
- Use the up and down buttons to change the document order.
- Remove any PDF you do not want to include.
- Enter a filename for the combined document.
- Click Merge PDF Files.
- Download the finished PDF.
The merger creates a new PDF by copying the pages from each selected document into one output file. Client-side PDF merging with pdf-lib follows this approach and keeps the processing in the browser. 2
Frequently Asked Questions
Yes. Select multiple PDF files and arrange them in the order you want before merging.
No. After the PDF library loads, the selected files are read and processed inside your browser. The merger does not send your PDF documents to a ComfortSkillz server.
Yes. Use the up and down controls beside each file to change the order before merging.
No. The original files remain unchanged. The tool creates a separate merged PDF.
The merger copies pages into a new PDF rather than converting each page into an image. The output therefore keeps the source page content without image-based re-rendering.
A malformed, encrypted or unusually complex PDF can fail to load. Try opening the source document in a standard PDF reader first. Large files can also require substantial browser memory.
