How to Merge PDFs for Free

Published on Dec 27, 2025
Updated on Dec 27, 2025
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How to merge PDFs for free

The digital age has brought with it an avalanche of PDF documents. Practical, lightweight, and easily shareable, PDFs are now the standard for contracts, invoices, manuals, and much more. What happens when we find ourselves with multiple PDFs that we would like to merge into a single file, perhaps to better organize our documents or to simplify sharing? No problem! There are several solutions, both online and offline, and even smartphone apps, that allow you to merge PDFs for free quickly and easily. In this complete guide, we will explore all the options at your disposal, with step-by-step instructions and useful tips to achieve the desired result.

Merge PDFs for Free Offline

If you prefer to work offline, without having to upload your documents to the internet, there are several software solutions that allow you to merge PDFs for free directly on your computer. Let’s look at some of the most popular options:

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PDFill PDF Tools (Windows)

PDFill PDF Tools is free software for Windows that offers a complete suite of tools for PDF management, including the merge function.

  • Download and Installation: Download the program from the official PDFill website and follow the instructions for installation.
  • Merging PDFs: Open PDFill PDF Tools and select “Merge PDF Files”. Add the PDFs you want to merge by dragging them into the program interface or using the “Add PDF Files” button. Order the files according to your needs and click on “Save As” to create the merged PDF.

PDFill PDF Tools is a versatile and powerful solution, ideal for those who need complete software for PDF management.

Adobe Acrobat Pro DC (Windows/macOS)

Adobe Acrobat Pro DC is the benchmark software for PDF management, available for both Windows and macOS. Although it is paid, it offers a free trial that allows you to use all its functions, including PDF merging.

  • Merging PDFs: Open Adobe Acrobat Pro DC and go to “Tools” > “Combine Files”. Click on “Add Files” and select the PDFs to merge. Reorder the files if necessary and click on “Combine Files” to create the merged PDF.

Adobe Acrobat Pro DC offers an intuitive interface and a wide range of advanced tools, but it is an expensive solution if you need prolonged use.

Preview (macOS)

If you use a Mac, you can merge PDFs for free directly with Preview, the default application for viewing images and PDFs.

  • Merging PDFs: Open the first PDF with Preview. Activate the sidebar (View > Thumbnails) and drag the other PDFs you want to merge into the sidebar, placing them in the desired order. Go to “File” > “Print” and select “Save as PDF” in the dropdown menu.

Preview is a simple and immediate solution for Mac users, but it offers limited functionality compared to dedicated software.

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Merge PDFs for Free Online

If you don’t want to install software on your computer, you can opt for online solutions that allow you to merge PDFs for free directly from your browser.

PDF Candy

PDF Candy is a website that offers a wide range of tools for PDF management, including a handy tool to merge PDFs.

  • Merging PDFs: Go to the PDF Candy website and select “Merge PDF”. Upload the PDFs you want to merge by dragging them into the dedicated area or using the “Add file” button. Order the files and click on “Merge PDF” to create the merged file.

PDF Candy is a free online solution, easy to use and accessible from any device connected to the internet.

Other Online Solutions

In addition to PDF Candy, there are numerous other online solutions to merge PDFs for free, such as:

  • Smallpdf: Offers an intuitive interface and the ability to upload files from different sources, such as Dropbox and Google Drive.
  • I Love PDF: Similar to Smallpdf, it offers a wide range of tools for PDF management, including merging, compression, and conversion.
  • Soda PDF: Another option with a user-friendly interface and several additional features.
Discover more →

Apps to Merge PDFs for Free

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If you need to merge PDFs on the go, you can use dedicated apps for smartphones and tablets.

  • PDFelement: Available for Android and iOS, it offers a complete suite of tools for PDF management, including merging.
  • Adobe Acrobat Reader: The official Adobe app offers the PDF merge function, even in the free version.
  • Foxit PDF Reader: Another popular app with merge functionality and other options for PDF management.
Discover more →

Benefits of Merging PDFs

Merging multiple PDFs into a single file offers several advantages:

  • Organization: Keep your documents sorted and easily accessible.
  • Sharing: Simplify the sharing of multiple documents simultaneously.
  • Clutter Reduction: A single file is easier to manage than many separate files.
  • Professionalism: Present your documents in a more professional and organized manner.

Best Practices for Merging PDFs

To get the best results when merging PDFs, follow these tips:

  • File Order: Ensure the PDFs are in the correct order before merging them.
  • Security: If the PDFs contain sensitive information, use reliable software or online services.
  • Quality: Check the quality of the final PDF, ensuring that text and images are legible.
  • File Size: If the final PDF is too large, you can compress it using online tools or dedicated software.

In Brief (TL;DR)

Merging PDFs for free is a simple and fast operation, thanks to the numerous solutions available.

You can use offline software like PDFill PDF Tools and Adobe Acrobat Pro DC, or opt for online services like PDF Candy and Smallpdf.

If you need to merge PDFs on the go, you can use dedicated apps like PDFelement and Adobe Acrobat Reader.

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Conclusions

disegno di un ragazzo seduto a gambe incrociate con un laptop sulle gambe che trae le conclusioni di tutto quello che si è scritto finora

We have reached the end of this complete guide on how to merge PDFs for free. As we have seen, the options available are numerous and varied, capable of satisfying the needs of any user, from the professional who needs advanced tools to the student who simply wants to organize their notes.

We explored offline solutions, ideal for those who prefer to work without an internet connection and have complete and powerful software at their disposal. PDFill PDF Tools proved to be an excellent choice for Windows users, thanks to its suite of free tools and intuitive interface. For those using macOS, Preview offers an integrated and immediate solution, while Adobe Acrobat Pro DC, although paid, represents the benchmark software for PDF management, with advanced features and a professional interface.

For those who prefer the flexibility and accessibility of online solutions, PDF Candy and the other web platforms we mentioned proved to be up to the task, allowing you to merge PDFs for free with just a few clicks, directly from the browser, without having to install any software.

Finally, we analyzed apps for smartphones and tablets, indispensable for those who need to merge PDFs on the go, wherever they are. PDFelement, Adobe Acrobat Reader, and Foxit PDF Reader offer complete and intuitive features, turning your mobile device into a real portable office.

Merging PDFs is not just a technical operation, but an important step towards better organization of your digital documents. A single PDF file, in fact, is easier to manage, archive, and share, helping to streamline workflow and improve productivity.

Remember that merging PDFs is just one of the many operations you can perform to optimize the management of your documents. Explore the other guides and tutorials on our blog to discover how to compress, convert, edit, and protect your PDFs, turning yourself into a true expert of this versatile file format.

And don’t forget, there is strength in unity, even in the world of PDFs!

Frequently Asked Questions

disegno di un ragazzo seduto con nuvolette di testo con dentro la parola FAQ
How can I merge password-protected PDFs?

To merge password-protected PDFs, you will first need to remove the protection using specific software or an online service.

Can I merge PDFs with different page sizes?

Yes, most software and online services for merging PDFs automatically handle pages of different sizes.

Is it possible to merge PDFs with interactive elements, such as forms and links?

Yes, generally interactive elements are maintained in the merged PDF. However, it is advisable to check the final result to ensure that everything works correctly.

Francesco Zinghinì

Electronic Engineer with a mission to simplify digital tech. Thanks to his background in Systems Theory, he analyzes software, hardware, and network infrastructures to offer practical guides on IT and telecommunications. Transforming technological complexity into accessible solutions.

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