Merge PDF

Merge two or more PDF documents into a unified file. Easily rearrange file order and download the combined document instantly in your browser.

Upload PDFs to Merge

Up to 50MB per file

Processed entirely in your browser. 100% private.

Key Takeaways & Quick Facts

Primary Purpose

Combine multiple PDF files into one single document.

Execution Environment

100% Client-Side In-Browser (Zero Cloud Uploads)

Standard Verification

Calculations tested against standard benchmarks

How to Use Merge PDF

Upload two or more PDF files by dragging and dropping or selecting files from your device.
Use the arrow buttons to rearrange the files into your desired page order.
Click "Merge PDFs" to combine all files into a single unified document.
Download your newly merged PDF file instantly.

How it Works

The Merge PDF tool uses client-side WebAssembly and JavaScript via pdf-lib to read the page structures of each uploaded PDF and copy them into a new document. Since the entire operation runs inside your web browser, your files remain completely private and are never transmitted over the network.

Examples

Input: Resume.pdf (1 page) + CoverLetter.pdf (1 page)

Result: MergedDocument.pdf (2 pages)

Input: Report_Part1.pdf (5 pages) + Report_Part2.pdf (8 pages)

Result: Complete_Report.pdf (13 pages)

Frequently Asked Questions

Are my PDF documents uploaded to a remote server?

No. All processing happens entirely within your web browser. Your sensitive documents never leave your computer.

Is there a limit on how many PDFs I can merge?

You can merge as many files as your device memory supports. For the smoothest browser experience, we recommend merging up to 20-30 documents at a time.