Combine PDF Files
Securely & Instantly
Join multiple documents into one polished PDF file.
100% Client-side processing. No server uploads.
Drag & Drop PDFs
or click to browse files
Secure Merging
Unlike other sites, we don't copy your files to a server. Merging happens directly on your device using WebAssembly.
Easy Organization
Drag, drop, and reorder files with ease. Combine invoices, reports, or chapters into a single master document.
Instant Speed
No upload wait times. No download queues. The process is as fast as your computer can handle it.
How Browser Merging Works
We use a powerful library called `PDF-LIB` to manipulate binary PDF data inside your browser memory.
- 1ParsingYour browser reads the structure of each uploaded PDF (pages, fonts, images).
- 2ConcatenationIt creates a new blank PDF and copies page objects from each source file into the new container.
Best For
Combine anything into one file.
Simple 3-Step Process
Upload Files
Drag and drop as many PDF documents as you need.
Arrange
Use the arrow keys to put files in the correct order for the final doc.
Merge
Click the button to generate and download your combined PDF instantly.
Common Questions
Do you keep my files?
No. Your files never leave your computer. The merging code runs in your own browser using WebAssembly technology.
Is there a limit?
No artificial limits on pages or files. The only limit is your device's RAM capacity.
How do I split a PDF instead?
Check out our 'Split PDF' tool in the menu to extract pages from a document.
Is it really free?
Yes. We support this tool via the ads on the page, so it stays free for everyone.
More PDF Tools
Professional grade tools running in your browser.