The simplest way to merge two PDFs depends on what device you have

You can merge two PDF files using tools already on your computer or phone — you do not need to buy software or sign up for a service. On Windows, macOS, and most phones, the built-in options work fine for straightforward merging. If you need to rearrange pages, delete pages, or combine more than two files at once, a dedicated tool (free or paid) becomes useful, but for a straightforward two-file merge, the native approach is usually fastest.

The method you choose depends on whether you are working on a computer or phone, and whether you need the merged file to stay on your device or be accessible from anywhere. Each path takes about five minutes once you know the steps.

Key Takeaways

  • Windows 11 and macOS both have built-in PDF tools that can merge files without installing anything new.
  • On Windows, you open both PDFs in Microsoft Edge, then print them together to a new PDF file.
  • On macOS, you open the PDFs in Preview, drag pages from one into the other, then save the result.
  • On phones, you can use the Notes app (iPhone) or Google Drive (Android) to combine PDFs without downloading a separate tool.
  • If you need to reorder pages or delete specific pages before merging, a free online tool or desktop software gives you more control than the basic methods.

Merging PDFs on Windows using Microsoft Edge

Microsoft Edge, the browser built into Windows 10 and 11, can open and print PDFs. To merge two files, open the first PDF in Edge, then print both files together as a single new PDF.

Open the first PDF by right-clicking it, selecting "Open with", and choosing Microsoft Edge. Once it loads, hold Ctrl and click the second PDF file to select both. Right-click and choose "Open with" again, then Edge. Both files will open in separate tabs. Click the first tab, then press Ctrl+P to open the print dialog. In the print menu, change the printer to "Print to PDF" or "Microsoft Print to PDF". Under "Pages", type the page range for the first file (for example, "1-5" if it has five pages). Print that. Then go to the second tab, press Ctrl+P again, and print those pages to the same file — Edge will ask if you want to append them. Choose yes, and the files merge into one.

This method works reliably but requires you to know the page count of each file beforehand. If you make a mistake with the page ranges, you will need to start over.

Merging PDFs on macOS using Preview

The Preview app on macOS can open multiple PDFs and combine them by dragging pages between windows. This is the fastest method on Apple computers.

Open the first PDF in Preview (right-click it, select "Open With", choose Preview). Then open the second PDF the same way — it will appear in a new Preview window. In the first window, click "View" in the menu bar and select "Thumbnails" to show a sidebar with page thumbnails. Arrange the two Preview windows side by side on your screen. In the second window, select all pages (Cmd+A), then drag them into the thumbnail sidebar of the first window. The pages will appear at the end of the first document. Save the merged file by pressing Cmd+S, choose a new name, and confirm.

If you want the pages in a different order, you can drag individual thumbnails around in the sidebar before saving. This gives you more control than the Windows method without needing extra software.

Merging PDFs on iPhone using Notes

The Notes app on iPhone can scan documents and combine them into one note, which you can then export as a PDF. This works if both of your PDFs are documents you can photograph or if you have them stored in iCloud.

Open Notes and create a new note. Tap the camera icon, then "Scan Documents". Scan the first PDF by photographing it or selecting it from your photo library. Tap "Save". Then tap the camera icon again and scan the second PDF the same way. Once both are in the note, tap "Share", select "PDF", and choose where to save it (Mail, Files, iCloud Drive, or another app). The merged PDF will be ready to use.

This method works best if you have physical copies or screenshots of the PDFs. If the PDFs are already digital files on your phone, using a free online tool (described below) is often faster.

Merging PDFs on Android using Google Drive

Google Drive on Android does not merge PDFs directly, but you can upload both files and use Google's web interface from your phone's browser to combine them. Alternatively, use a free online tool designed for this task.

Open Google Drive on your phone, tap the plus icon, and upload both PDF files. Once they are uploaded, open your phone's web browser and go to drive.google.com. Find the first PDF, right-click it (or long-press), and look for an option to open it with a PDF editor or viewer. Some Android phones have a built-in PDF tool; if yours does not, you will need to use a free online merger instead (see the next section).

The most reliable Android approach is to use a free online PDF merger, since the built-in options vary by phone model and Android version.

Using a free online PDF merger if built-in tools do not work

If your device does not have the tools described above, or if you need to reorder pages before merging, free online PDF mergers are available. Common ones include ILovePDF, Smallpdf, and PDF.io. These sites let you upload two or more PDFs, arrange the pages in any order, and read the merged result.

To use one: go to the website, click "Select Files" or "Upload", choose your two PDFs, and confirm. The site will show thumbnails of all pages from both files. Drag pages to reorder them if needed. Click "Merge" or "read", and the combined PDF will save to your computer or phone.

The trade-off with online tools is that your files are temporarily stored on someone else's server. If the PDFs contain sensitive information (bank statements, medical records, legal documents), check the website's privacy policy first. Most reputable sites delete files within hours, but you are trusting a third party with the data. If that concerns you, stick with the built-in methods on your device.

When to use desktop software instead of quick methods

If you regularly merge, split, or edit PDFs, installing free desktop software like PDFtk, LibreOffice Draw, or Foxit Reader gives you more control and keeps files on your device. These programs let you merge unlimited files, delete specific pages, rotate pages, and compress the result — all without uploading to the internet.

PDFtk is command-line based and works on Windows, macOS, and Linux. LibreOffice Draw is a full office suite that opens PDFs and lets you save them merged with others. Foxit Reader is a lightweight viewer with basic editing. All three are free. If you need professional features like OCR (converting scanned images to searchable text) or batch processing (merging hundreds of files at once), paid software like Adobe Acrobat Pro or Nitro PDF offers those, but for occasional two-file merges, the built-in methods or free online tools are sufficient.

Frequently Asked Questions

Can I merge PDFs that have different page sizes or orientations?

Yes. All the methods described here will combine PDFs regardless of page size or orientation. The merged file will preserve each page exactly as it was in the original. If you want to resize or rotate pages before merging, use a free online tool or desktop software, which usually have options to standardize page size.

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 and remember the password, open it in Preview (macOS) or Edge (Windows), enter the password when prompted, then save an unprotected copy. Then merge as usual. If you do not have the password, you will need to contact whoever created the file.

Will merging two PDFs make the file size much larger?

The merged file will be roughly the size of the two original files added together. If file size is a concern, use a free online tool that offers compression, or use desktop software like PDFtk to compress the result after merging. Compression reduces quality slightly but can cut file size by 30 to 50 percent.

Can I merge more than two PDFs at once?

The built-in methods (Edge, Preview, Notes) work best for two files. If you need to merge three or more, a free online tool or desktop software is faster. Most online mergers let you upload five to ten files at once and arrange them in any order before downloading the result.

Is it safe to use free online PDF mergers with confidential documents?

Free online tools store your files on their servers temporarily. If the documents are confidential, check the website's privacy policy to see how long files are kept and whether they are encrypted in transit. For highly sensitive files (tax returns, medical records, legal contracts), use the built-in methods on your device instead, since the files never leave your computer or phone.