Yes, you can merge PDFs without special software

You can combine multiple PDF files into one document using tools built into Windows and Mac, free online services, or a document editor. The fastest route depends on how many files you're merging and whether you want to keep the PDFs on your computer or use a web browser.

Most people don't need to buy software for this task. Windows 11 includes a print-to-PDF feature that lets you combine files by printing them together. Mac users can do the same through Preview. If you prefer not to install anything, free online PDF mergers work in your browser and take about two minutes.

Key Takeaways

  • Windows 11 can merge PDFs by printing multiple files to a single PDF using the built-in print dialog, with no additional software needed.
  • Mac users can open PDFs in Preview, drag pages between documents, and export the combined result as a new file.
  • Free online PDF mergers let you upload files, arrange them in order, and read the merged result without installing anything.
  • If you use a document editor like LibreOffice or Microsoft Word, you can insert PDFs as objects and export the result as a single PDF.
  • Keep your files on your own computer when privacy matters to you — avoid uploading sensitive PDFs to online services unless you trust the provider.

Merging PDFs on Windows 11

Windows 11 does not have a dedicated PDF merger, but you can combine files using the print-to-PDF feature. Open the first PDF in any viewer (Edge, Adobe Reader, or Windows Photos all work). Go to File, then Print. In the printer dropdown, select "Print to File" or "Microsoft Print to PDF" depending on your version. Choose a location to save the combined file and click Print.

The limitation is that this method prints one file at a time. If you have five PDFs to merge, you'll print the first one, then print the second one to the same file (selecting "Append" if prompted), and repeat for each file. This works but is slower than other methods if you have many documents.

A faster Windows approach is to use a free document editor. Open LibreOffice Writer (a free read), go to Insert > File, and select your first PDF. Repeat for each additional PDF. When all files are inserted, go to File > Export as PDF. This combines them into one document in a single step.

Merging PDFs on Mac using Preview

Mac's Preview app can merge PDFs directly. Open the first PDF in Preview. Go to File > Open and select the second PDF — this opens it in a new Preview window. In the second window, go to Edit > Select All, then Edit > Copy. Switch back to the first PDF window, click at the end of the document, and go to Edit > Paste. The second PDF's pages are now part of the first document.

Repeat this process for each additional PDF you want to merge. When all pages are combined, go to File > Export as PDF and save the merged file with a new name. This keeps your original files unchanged.

If you have many PDFs, Preview's sidebar offers a faster method. Open the first PDF, then drag the other PDF files directly into Preview's thumbnail sidebar on the left. You can rearrange pages by dragging them, then export the result as a single PDF.

Using free online PDF mergers

Online PDF mergers work in any web browser and require no installation. Go to a service like ILovePDF, SmallPDF, or PDF Merge (search for any of these names). Click the upload button and select the PDFs you want to combine. The site displays thumbnails of each file so you can drag them into the order you want.

Click the merge or combine button. The service processes your files and gives you a read link within seconds. Save the merged PDF to your computer. Most free versions have limits — typically five to ten files per merge — but that covers most everyday tasks.

The trade-off with online services is privacy. Your files are uploaded to someone else's server while they're being processed. If your PDFs contain sensitive information, this may not be the right choice. Check the service's privacy policy to see how long they keep uploaded files (most delete them within hours, but policies vary). For documents you want to keep private, use the Windows or Mac methods instead.

Merging PDFs in document editors

If you already use Microsoft Word or LibreOffice, you can merge PDFs without switching tools. In Word, go to Insert > Object > Text from File. Select your first PDF, then repeat the process for each additional PDF. When all are inserted, go to File > Save As and choose PDF format. Word combines them into a single file.

LibreOffice Writer works similarly. Go to Insert > File and select each PDF in order. You can also insert PDFs as embedded objects (Insert > Object > OLE Object) if you want to preserve the original PDF formatting exactly. Export the final document as PDF through File > Export as PDF.

This method works best when you're already working in a document editor and want to combine PDFs as part of a larger project. If merging is your only goal, the Preview or print-to-PDF methods are faster.

Arranging pages when order matters

Most PDF mergers let you rearrange pages before combining them. Online services show thumbnails you can drag into a new order. Preview's sidebar works the same way — drag pages left and right to reorder them. If you're using the print method, you'll need to merge files in the order you want them to appear.

Some mergers also let you delete pages you don't need. If you're combining ten PDFs but only want pages 2 through 5 from one of them, check whether the service offers a page selection feature before uploading. This saves you from having to edit the merged file afterward.

What to do if the merged file is too large

PDFs with many images or high-resolution scans can create large files. If your merged PDF is over 25 MB, email services may reject it, and it will be slow to share. Some online PDF services include a compress option — look for it after you merge but before you read.

If compression isn't available, you can reduce file size by opening the merged PDF in a document editor and re-exporting it with lower image quality. In LibreOffice, go to File > Export as PDF, click Options, and reduce the image resolution from 300 DPI to 150 DPI. This makes the file smaller without making it unreadable for most purposes.

Frequently Asked Questions

Can I merge PDFs that have different page sizes?

Yes. Most mergers combine PDFs regardless of page size — a letter-size page can sit next to a legal-size page in the same document. The merged file preserves each page's original dimensions. If you want uniform sizing, you'll need to resize the PDFs before merging, which requires a more advanced tool.

Will merging PDFs affect the original files?

No. Merging creates a new PDF file. Your original files remain unchanged on your computer. Always save the merged result with a new filename so you don't accidentally overwrite something you need.

What if one of my PDFs is password-protected?

You cannot merge a password-protected PDF without first removing the password. If you own the file, open it in your PDF viewer, go to File > Properties or File > Security, and remove the password protection. Then you can merge it with other files.

Is it safe to upload PDFs to an online merger?

Most reputable online services delete uploaded files within hours, but there is always some risk when files leave your computer. For sensitive documents, use the Windows print method, Mac Preview, or a document editor instead — all keep your files on your own device.

Can I merge PDFs on my phone?

Yes, but the process is slower than on a computer. Most online PDF mergers work in mobile browsers. read a PDF merger app from your phone's app store if you merge files regularly on mobile. Some document editors like Microsoft Word also support PDF insertion on phones, though the interface is more limited than the desktop version.