How to Merge PDFs on Windows 11 (3 Free Methods)

To merge PDFs on Windows 11, upload your files to a free online tool like PDFPulp and download the combined result in seconds. No software install required.

Windows 11 can display PDFs in Microsoft Edge, but it cannot combine multiple PDF files into one. That means you need a third-party solution. This guide covers three free methods: a browser-based tool that works instantly, a Microsoft Store app for offline use, and a PowerShell approach for developers who prefer the command line.

Why Windows 11 Cannot Merge PDFs Natively

Microsoft Edge includes a basic PDF viewer. You can scroll, search, annotate, and print. But merging two or more PDFs into a single file is not part of the feature set. The same applies to the built-in Reader app.

This is a gap that has existed since Windows 10. Microsoft has not added native PDF merge support in any Windows 11 update as of April 2026. So every Windows 11 user who needs to combine PDF files has to reach for something else.

The good news: you have free options that take less than a minute.

Method 1: Merge PDFs Online with PDFPulp (Fastest)

This is the quickest way to combine PDF files on Windows 11. It works in any browser — Edge, Chrome, Firefox, or Brave. No install, no sign-up.

1. Open your browser and go to PDFPulp's merge tool.
2. Drag and drop your PDF files onto the upload zone, or click to select them from your file explorer.
3. Reorder the files by dragging them into the sequence you want.
4. Click Merge.
5. Download the combined PDF.

The whole process takes under 10 seconds for files under 10MB. Your merged PDF has no watermarks and no branding — just your content.

What you get for free: 5 merge operations per day, files up to 100MB each. No account needed. Your files are encrypted during transfer and auto-deleted within 24 hours.

When to use this method: You need to combine a few PDFs quickly and you are online. This covers 90% of use cases.

Method 2: PDF Merger & Splitter from the Microsoft Store

If you prefer a desktop app that works offline, the Microsoft Store has a free option.

1. Open the Microsoft Store on your Windows 11 machine.
2. Search for PDF Merger & Splitter (published by AnySoft).
3. Click Get to install the app.
4. Launch the app and click Merge PDF.
5. Click Add PDFs and select the files you want to combine.
6. Reorder the files if needed using the up and down arrows.
7. Click Merge and choose where to save the output file.

This app is lightweight and does the job. The interface is basic but functional. It handles merge and split operations without requiring a subscription.

Limitations: The app occasionally shows ads in the free version. File size handling can be slower than browser-based tools for large PDFs. Updates depend on the developer's schedule.

When to use this method: You need to merge PDFs offline, or you want a local app you can pin to your taskbar.

Method 3: PowerShell with PDFtk (Command Line)

For developers and power users who prefer the terminal, you can merge PDFs on Windows 11 using PDFtk (PDF Toolkit) from PowerShell.

Install PDFtk

1. Download PDFtk Server from the official PDFtk website. Choose the Windows installer.
2. Run the installer and accept the default installation path.
3. Verify the installation by opening PowerShell and running:

pdftk --version

You should see the version number. If PowerShell does not recognize the command, add the PDFtk installation folder to your system PATH.

Merge Files

4. Navigate to the folder containing your PDF files:

cd C:\Users\YourName\Documents\pdfs

5. Run the merge command:

pdftk file1.pdf file2.pdf file3.pdf cat output merged.pdf

6. Check the output:

Get-Item merged.pdf | Select-Object Name, Length

You can also merge every PDF in a folder with a wildcard:

pdftk *.pdf cat output all-merged.pdf

PDFtk sorts files alphabetically when using the wildcard. If order matters, rename your files with a numeric prefix (01-intro.pdf, 02-chapter.pdf) or list them explicitly.

When to use this method: You merge PDFs regularly and want to automate the process, or you are already comfortable with the command line. This is also the best choice for batch operations where you need to merge dozens of files using a script.

Which Method Should You Use?

For most people, Method 1 is the answer. You open a browser tab, drop your files, and you are done. No install, no account, no watermarks.

If the merged file ends up larger than you expected, you can compress it for email using a separate tool. And if you need to do the opposite — pull pages out of a PDF — check out our guide on how to split a PDF into individual pages.

Tips for Better PDF Merges

Check page orientation first. If some PDFs are landscape and others are portrait, the merged file will keep each page's original orientation. That is usually fine, but review the output to make sure nothing looks off. You can always rotate individual pages afterward.

Watch your file order. Most merge tools process files in the order you add them. If the order matters (like chapters of a report), double-check the sequence before you hit Merge.

Reduce file size before merging. If you are combining several large scans, compress each one first. This keeps the final merged file manageable and avoids hitting file size limits.

Frequently Asked Questions

Can Windows 11 merge PDFs without extra software?

No. Windows 11 does not include a built-in PDF merge feature. You can view and print PDFs in Edge, but combining multiple files into one requires a third-party tool or an online service like PDFPulp.

Is it safe to merge PDFs online?

Yes, if you pick a service that encrypts uploads and deletes files afterward. PDFPulp uses AES-256 encryption for transfers and auto-deletes all files within 24 hours. No account required, no ads, no data harvesting.

Does merging PDFs reduce quality?

No. Merging combines pages without re-encoding them. The text, images, and formatting in each source file stay exactly as they were. If the merged file is too large afterward, you can compress it separately.

How many PDFs can I merge at once for free?

On PDFPulp, you can merge as many files as you want in a single operation, up to 100MB total. Free users get 5 merge operations per day. No watermarks on any tier.

What is the best free PDF merger for Windows 11?

For most people, a browser-based tool like PDFPulp is the fastest option — no install, no account, works on any Windows 11 machine. If you prefer a desktop app, PDF Merger & Splitter from the Microsoft Store is a solid free choice.

Can I merge PDFs in Windows 11 without installing software?

Yes. Browser-based tools like PDFPulp run entirely in your web browser, so there is nothing to download or install. Open the merge tool, drop your files, and download the result. Works in Edge, Chrome, Firefox, or any other browser on Windows 11.

Can I rearrange pages when merging PDFs?

Yes. Most merge tools let you reorder files before combining them, which controls the page sequence in the output. If you need to rearrange individual pages within a single PDF, use a split tool to extract pages first, then merge them in your preferred order.

How do I merge PDFs on Windows 10?

The same methods in this guide work on Windows 10. Browser-based tools like PDFPulp are OS-independent, and PDFtk runs on Windows 10 the same way it does on Windows 11. The Microsoft Store app PDF Merger & Splitter is also available for Windows 10.

Can I merge password-protected PDFs?

It depends on the protection type. If the PDF requires a password to open, you need to enter the password and remove the encryption before merging. If the PDF only has editing restrictions, most merge tools can still process it. PDFtk supports decrypting password-protected files via command line if you have the password.

What happens to bookmarks when I merge PDFs?

Most online merge tools and PDFtk preserve existing bookmarks from each source file. The bookmarks appear in the merged PDF in the same order as the source files. However, some simpler tools may strip bookmarks during the merge, so check the output if bookmarks matter to your workflow.

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

There is no hard limit on the number of files you can combine in a single merge. The practical constraint is total file size. On PDFPulp, the combined upload cannot exceed 100MB on the free tier. PDFtk on the command line has no file size limit beyond your available disk space.

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Ready to merge your PDFs? Drop your files into PDFPulp's merge tool and download the combined result in seconds. It's free (5 operations per day), requires no account, and adds no watermarks.

Try PDFPulp's Merge Tool →