How to Edit PDF Dimensions Like a Pro
Mar 1, 2025

Ever had to print your Adobe Acrobat PDF document in a different format or send it to another country with different standards? Changing the page size of a PDF is a common task, whether it’s for printing, fitting a specific paper size, or improving readability.
Adobe Acrobat documents often contain a mix of different page sizes, such as letter size, legal, or even custom page formats. If your PDF document doesn’t fit your needs, you’ll need to adjust the PDF page size to match specific requirements.
In this guide, we’ll walk you through the steps and compare online versus mobile options.
Why would you need to change PDF dimensions?
There are several reasons why you might need to adjust the dimensions of your Adobe Acrobat file:
Standardization: fit your original PDF to common paper sizes.
Formatting: ensure your content appears as intended.
Publishing: correct the PDF page size before sending or printing.
File size adjustments: resize to meet restrictions for email or uploads.
Readability: enhance the file’s appearance for easier presentation.
How to edit PDF dimensions
If you need to adjust the dimensions of a PDF, follow these steps to resize your file with MobiDocs:
Go to File → Open...

2. MobiDocs will notify you that it will create a copy of the file without altering the original. Select OK.

3. Once the PDF is open, select Format → Page...

4. You can either modify the Margin size, page Orientation, and/or content of Multiple Pages.

5. Select Paper and either enter your desired PDF page size or click the dropdown and choose from the pre-set ones.

6. After making the necessary adjustments, go to File → Convert to PDF...

7. Select the desired location and hit Convert.
Benefits of professional tools like MobiPDF and MobiDocs
When it comes to changing PDF files, both MobiPDF and MobiDocs offer tools that help you work smarter, not harder.
MobiPDF: your all-in-one PDF powerhouse
Edit text, images, and PDF page dimensions effortlessly.
Transform your PDFs into Office docs with no loss in quality.
Edit and sign on the go with the MobiPDF app.
MobiDocs: document editing made simple
Style text with rich formatting and organize it with bullets and images.
Change your documents without compromising on quality.
Track changes and create a table of contents for smooth teamwork.
Editing PDF dimensions online or on mobile
Various free online tools offer quick, no-fuss ways to resize Adobe Acrobat files. Platforms like ILovePDF, Sejda, and PDF2Go allow you to easily transform PDFs from any browser.
How to use resizing PDFs online tools
Visit the online tool of your choice and upload your file.
Choose the resize, crop, or file compression option.
Adjust the PDF page dimensions or size as desired.
Download the document.
Changing PDFs on mobile with MobiDocs
Need to resize your documents on the go?
Follow these steps to resize your PDF files using your mobile:
First, change your PDF files to Word.
From the menu dropdown, select Layout to change the Margin, Orientation, Size, or Page Setup.
Tap the three dots and Convert to PDF.
Conclusion
Transforming your PDF dimensions is a simple yet essential task, whether you're adjusting for printing, standardizing your document, or optimizing it for better readability.
Try MobiPDF today to resize your PDFs effortlessly!
By day, Reny is a dedicated copywriter; by night, she’s an avid book reader. With over four years of copywriting experience, she has worn many hats, creating content for industries like productivity software, project finance, cybersecurity, architecture, and professional growth. Reny’s life goal is simple: to craft content that speaks to her audience and helps solve their challenges— big or small—so they can save time and be the best version of themselves.