Merge PDF Online
Combine multiple PDF files into a single document, in the order you choose — free, and processed entirely in your browser.
Click to select or drag and drop PDF files
Select two or more PDF files to combine, in any order — you can reorder them below.
How to Use This Tool
Click the drop zone (or drag files onto it) to select two or more PDF files. Each file appears in a list with its name and size — use the up and down arrows to reorder them, or the ✕ button to remove one. When you're happy with the order, click "Merge PDFs" to combine them into a single document and download it automatically.
How It Works
This tool reads each selected PDF directly in your browser using a local PDF-processing library, copies every page from each file in the order shown in your list, and assembles them into one new PDF. Nothing is uploaded — the merge happens entirely in your browser tab, and the finished file is handed to you as a direct download.
Why This PDF Tool Is Useful
Combining multiple PDFs into one is one of the most common everyday document tasks: students merging chapter scans into one study packet, professionals combining a cover letter with a resume and portfolio, freelancers assembling an invoice with supporting receipts, or office workers joining several signed forms into a single file to send. This tool does that in seconds without installing software.
Best Practices
Double-check the file order in the list before merging — it's much easier to fix with the up/down arrows now than to re-do the merge afterward. If a file fails to load, it may be password-protected or corrupted; try removing it and merging the rest. For very large PDFs, merging may take a few extra seconds — the processing indicator will let you know it's still working.
Frequently Asked Questions
Are my PDF files uploaded anywhere?
No. This tool reads and combines your files directly in your browser. They are never sent to a server by this tool's logic.
Is there a limit to how many files I can merge?
There's no hard-coded limit, but very large selections (many files or very large PDFs) can be slow or hit browser memory limits — a warning appears if your selection is unusually large.
Can I merge password-protected PDFs?
No. Encrypted or password-protected PDFs can't be opened by this browser-based tool. Remove the password first using the PDF's original source or another tool, then merge.
Does merging change the page content?
No — each page is copied as-is from the source files; only the order and grouping of pages changes.