Merge PDF Files
Combine multiple PDF files into a single document — free, fast, and private.
Drop PDF files here or click to upload
PDF files only · You can add multiple files
Add at least 2 PDF files to merge them
Free Online PDF Merger — Combine PDFs Instantly
Our free PDF merger lets you combine multiple PDF files into one document right in your browser. No uploads to external servers, no account required — just drag, drop, reorder, and merge. Perfect for combining reports, contracts, invoices, and more.
Use the up/down arrows to reorder your files before merging. The final PDF will follow the exact order you specify, giving you full control over the output.
Why Use WriteGenius PDF Merger?
100% Private
All merging happens locally in your browser using pdf-lib. Your PDF files never touch our servers.
Merge Any Number of Files
Combine 2, 5, 10, or more PDF files into a single document without any file count restrictions on Premium.
Control Merge Order
Use the up/down arrows to arrange files in exactly the order you want before merging.
No Software Needed
Works entirely in your browser — no Adobe Acrobat, no installs, no plugins required.
Preserves Quality
pdf-lib merges PDFs without re-encoding, preserving the original quality, fonts, and formatting.
Instant Download
Download your merged PDF immediately. No waiting, no email, no ads — just click and download.
How to Merge PDF Files
Upload Your PDFs
Click the upload zone or drag and drop your PDF files. You can add as many files as you need.
Arrange the Order
Use the up/down arrows next to each file to set the order they will appear in the final merged PDF.
Merge & Download
Click "Merge PDFs" and your combined file will download instantly as merged.pdf.