Merge PDF
Combine PDF reports, statements, scans, and forms into one file — dragged into the order you want, processed on your own device.
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YOYOPDF provides browser-based tools for common PDF and image tasks. Fast, easy and free.
Powerful Tools to Work with PDFs
YOYOPDF provides browser-based tools for common PDF and image tasks. Fast, easy and free.
Local by Design
Document contents stay on your device while tools process them in the browser; YOYOPDF does not upload your files.
Blazing Fast
Our tools are optimized for speed to save your time and increase productivity.
Works Across Devices
Use YOYOPDF in a modern desktop, tablet or mobile browser. No installation required.
Always Free
All tools are completely free to use. No hidden charges, no sign up needed.
Everything You Need. All in One Place.
Use YOYOPDF for common PDF and image tasks while keeping document processing on your own device.
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View all tools →Why use Merge PDF?
Merging comes up whenever a single PDF needs to hold what started as several separate files.
One file to send instead of many
Attaching five separate scans to an email invites at least one of them to get lost or opened out of order. One merged PDF removes that risk entirely.
Reports built from separate sections
When a report is drafted in pieces — cover page, chapters, appendix — merging is how those pieces become the single document you actually submit.
Scanned pages that arrived as separate files
A scanner or phone scanning app often saves each page as its own PDF. Merge PDF turns that pile back into one ordered document.
How it works
Upload
Add two or more PDF files from your device. Nothing is sent anywhere at this step.
Arrange
Drag the files into the exact order you want them to appear in the final document.
Merge
pdf-lib combines every page, in order, into a single new PDF — entirely in your browser.
Download
Save the merged file to your device. Your original files are untouched.
Key features
No page limit
Merge as many files as your browser's memory allows — no artificial cap.
Drag-to-reorder
Set the final page order visually before merging, not after.
Runs in your browser
Merging runs the moment you drop files in — pdf-lib combines them locally, no server round-trip.
No sign-up
Open the tool and start merging — no account, no email, no waiting.
Works on any device
Drop files and merge from a laptop, tablet, or phone — the picker adapts to the screen.
Free
Combine PDFs without a watermark or per-merge fee, within the published browser safety limits.
Who uses Merge PDF?
Students
Combine scanned assignment pages or multiple research PDFs into one file before submitting.
Business
Merge a proposal's cover letter, pricing sheet, and terms into a single document for a client.
HR
Combine an offer letter, ID proofs, and policy documents into one onboarding packet.
Legal
Assemble exhibits or supporting documents into one file for filing.
Finance
Combine monthly statements or invoices into a single record for an audit or filing.
Teachers
Merge individual worksheet PDFs into one packet to print or share with a class.
Frequently asked questions
Does merging PDFs upload my files anywhere?
No. Merge PDF runs entirely in your browser using pdf-lib — your files never leave your device.
Is there a limit on how many PDFs I can merge?
You can select up to 40 files (400 MB total). Each PDF can be up to 200 MB and 1,500 pages so one batch cannot exhaust the browser.
Can I reorder pages before merging?
Yes, drag files into the order you want before combining them into the final PDF.