HOW IT WORKS
Merge PDF in three steps
- Choose or drop your PDF files.
- Check their order in the list.
- Process and download the result.
ON-DEVICE PROCESSING
Merge PDFs privately in your browser
Choose 2–20 PDF files. VietPDF combines them in list order and creates a new PDF directly in your browser.
LOCAL WORKSPACE
Choose PDFs to merge
Files are merged in the order shown below.
No documents selected
PRACTICAL GUIDE
What to know before you merge pdf
Merge PDF is designed for finished documents that need to become one file in a known order. VietPDF copies pages into a new document; it does not turn pages into images or intentionally reduce image quality.
Client packages
Combine a proposal, appendices and terms while keeping the source files available for later edits.
Course material
Put lessons, exercises and answer sheets in the intended order before archiving or printing.
Internal records
Group PDFs from one reporting period without sending document contents to a remote processor.
HOW THE PDF CHANGES
Technical limits to understand
Page quality
Pages are copied at the PDF structure level instead of being captured as images. Output size can differ because structure and metadata are rewritten.
Forms and signatures
Interactive forms, bookmarks, attachments and signatures should be checked. Creating a new document does not preserve the validity of source signatures.
Browser memory
The browser may hold every input and the output at once. For large packages, close unused tabs or use the Windows app.
TROUBLESHOOTING
If the result is not what you expected
Why are pages in the wrong order?
Files are merged from top to bottom. Reorder the list with the arrow buttons before processing.
Why did the browser run out of memory?
Several large PDFs can require much more RAM than their file sizes suggest. Process fewer files per batch or use Windows.
FAQ
Frequently asked questions
Are my PDFs uploaded to a server?
Not in the current web mode. Files are read and the result is created in your browser.
Does merging reduce quality?
VietPDF copies pages into a new document without intentionally compressing images. Some internal metadata may change.
Can I merge password-protected PDFs?
Not yet. Unlock the document with a tool you trust before using VietPDF.