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WATCH: Proven Steps to Resize PDF to A4 on Windows/Mac/Phone

  • By Steven
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  • Updated on July 9, 2025
Introduction:
A4, an internationally standardized paper size, is the most commonly used and accepted paper size worldwide. It is widely used for business documents, school reports, proposals, and more. Furthermore, most home printers default to A4 as the tray size. Also, almost all printers support A4 paper size printing. Therefore, it is a good choice to resize your PDFs or other Word documents to A4 size. In this SwifDoo PDF post, let’s learn how to resize PDF to A4 with good PDF editors on different devices.
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Best PDF Tool to Resize PDF to A4

To resize PDFs to A4 or other paper sizes on different platforms, I highly recommend SwifDoo PDF, which is available on Windows, Mac, iPhone, and Android. With its well-organized and user-friendly interface, you can master how to use it in a short time, even if you are a beginner.

In addition to working as a PDF to A4 resizer, SwifDoo PDF supports cropping PDF pages, adding hyperlinks to PDFs, editing text and images in PDFs, combining PDF files, protecting PDFs, converting PDFs, and more. You can download it and explore its various features!

How to Resize PDF to A4 on Windows

With SwifDoo PDF, you can resize PDF to A4 size via page setup or printing. In the following paragraphs, I will show you a detailed tutorial. You can click the button below to get SwifDoo PDF for Windows in advance. Then read the tutorial below and have a try.

Option 1. Resize PDF to A4 via Page Setup

Step 1. After installing SwifDoo PDF on your Windows PC, run it to access its main interface and click the Open tab to upload the PDF you need to resize.

Step 2. Under the Edit tab, choose the Page Setup option.

Step 3. The Page Setup window will appear, expand the Standard Size dropdown and choose the A4 option. Then don’t forget to tick the All Pages checkbox. Click OK to confirm the operation.

Choose the Page Setup option and set Standard Size to A4 for all PDF pages in SwifDoo PDF

Step 4. Finally, open the SwifDoo menu and click Save to save the resized PDF file.

Open the SwifDoo menu and choose the Save option to save the A4-size PDF file

Option 2. Resize PDF to A4 When Printing

The other method to resize a PDF file to A4 size is to print it to an A4 physical PDF file. Here’s how to print a PDF file in A4 paper size with SwifDoo PDF.

Step 1. Directly click the Print icon in the upper-right corner of SwifDoo PDF. Alternatively, you can open the SwifDoo menu and click the Print option.

Click the Print icon in SwifDoo PDF

Step 2. On the Print window, check the All Pages option first. Next, open the Page Size and Orientation list and choose A4. Also, you can adjust other print settings. Finally, click the Print button.

Set the Paper Size to A4 for all PDF pages and click the Print button in SwifDoo PDF

How to Resize PDF to A4 on Mac

You can also use SwifDoo PDF for Mac to print a PDF file as an A4 file. The process is similar to Option 2 in SwifDoo PDF for Windows. Here, I’d like to provide you with additional options for PDF A4 resizing. You can use the built-in Preview or a third-party tool, Adobe Acrobat, to resize PDFs to A4 paper size. Read on to learn the exact steps to resize a PDF to A4 using Preview and Adobe Acrobat.

Resize PDF to A4 Using Preview

Step 1. Find the target PDF file, right-click on it, move to Open With, and choose Preview.

Step 2. Click the File tab and choose the Print option.

Step 3. Open the Paper Size option and select the A4 option.

Step 4. Expand the PDF list and click on Save as PDF.

Resize PDF to A4 via Adobe Acrobat

Step 1. Download, install, and launch Adobe Acrobat. Then open your PDF file in Adobe Acrobat.

Step 2. Click the File tab, choose Print, and customize the page size and handling.

Step 3. Go to Page Setup, choose A4 as the paper size, and click the Print button.

If you have the Acrobat Pro account, you can use the preflight tool. Go to Tools, select Print Production, and choose Preflight. Then click on Select single fixups, open the Pages section, choose the Scale pages to specified size option, and click the Edit button. Next, set the Short edge to 210 mm and the Long edge to 297 mm. Click OK and save the A4-size PDF file.

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How to Resize PDF to A4 on Phones

How can you resize PDFs to A4 on Android or iPhone? Instead of using third-party or online PDF tools, the built-in print features of Android and iPhone enable you to resize PDFs to A4. Below is a detailed tutorial for you.

Resize PDF to A4 on Android

Step 1. Open your PDF in the Chrome browser on your Android phone.

Step 2. Tap the three-dot icon and select the Print option.

Step 3. Hit the Save as PDF option, open the Paper Size option, and tap on the A4 (210 x 270 mm) option.

Step 4. Tap the PDF icon and choose the Save to … option to save the A4-size PDF file.

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Resize PDF to A4 on iPhone

Step 1. Open the target PDF in the Files app.

Step 2. Tap the Share icon and choose Print.

Step 3. Open the Paper Size list and choose A4. Then you can choose the target printer and the page range you want to resize to A4 size.

Tap the Print option and set the Paper Size to A4 in the Files app of iPhone

Step 4. If you only want to resize the PDF to A4 for viewing, you can tap the Share icon again and choose Save to Files. If you want to get a physical PDF file in A4 size, you can directly tap the Print option.

Tap the Share icon and choose the Save to Files option on iPhone

Online Tools to Resize PDF to A4

In addition, I rounded up several online PDF editors to aid you in resizing PDFs to A4 paper size.

To Sum Up

It is not difficult to resize PDF to A4 with a reliable tool. Whether you intend to get an A4-size PDF file on Windows, Mac, iPhone, or Android, SwifDoo PDF can complete that task. Also, you can use Preview and Adobe Acrobat to change the PDF size to A4 on a Mac. Meanwhile, iPhone and Android have built-in features to resize PDFs to A4 paper size.

Steven is a dedicated contributor at Swifdoo.com. He possesses a deep understanding of various technology domains, including PDF software, program components, and video recording software technologies. He is committed to providing you with the latest insights and solutions to technology-related issues.

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