Merge PDF Files
Upload multiple PDF files and combine them into a single document — all pages merged in the order your files are listed.
Click to upload, or drag and drop PDF files (multiple allowed)
Nothing is uploaded to a server — everything happens in your browser
How to Use This Tool
Upload two or more PDF files
Click the box above or drag and drop multiple PDFs at once.
Check the file order
This is the order pages will appear in the merged document.
Click "Merge & download PDF"
All files are combined into a single document.
Open your merged PDF
Every page from every file appears in sequence.
About the Merge PDF Tool
Combining several PDF files into one comes up constantly — merging separate chapter files into a full document, combining multiple scanned pages into one file, or consolidating several reports into a single document to send as one attachment instead of several.
This tool reads each uploaded PDF, copies every page from each file in sequence, and assembles them into a single new PDF document — preserving the original formatting, text, and images of each source file exactly as they were.
The entire merge operation happens locally in your browser using a JavaScript PDF manipulation library, which means your documents are never uploaded to a server — useful when merging files that contain sensitive or confidential content.
Frequently Asked Questions
Does merging preserve the original quality and formatting of each PDF?
Yes — each page is copied directly from the source PDF into the merged document, preserving the original text, images, fonts and formatting exactly as they appeared in the source files, with no re-rendering or quality loss.
Can I merge password-protected PDF files?
No — password-protected or encrypted PDFs need to be unlocked first before they can be merged, since the merge process needs to read the actual page content, which is inaccessible while the file remains encrypted.
Is there a limit to how many PDF files I can merge at once?
There's no strict limit imposed by this tool, though merging many large files will result in a bigger combined file and may take a bit longer to process, since everything runs using your device's own processing power.
Can I control which pages from each PDF get included, or is it always the whole file?
This tool merges the complete content of each uploaded PDF. If you need to include only specific pages from a source file, use the Split PDF tool first to extract just the pages you want, then merge those extracted files.
What happens if two of my PDFs have different page sizes?
Each page retains its own original size and orientation in the merged document — pages aren't resized or forced to match each other, so a merged document can contain pages of different sizes if the source files did.
Are my PDF files uploaded to a server during merging?
No — the entire merge operation happens locally in your browser using a JavaScript PDF library. Your files are never uploaded anywhere.