Tech and Science

Efficient PDF Resizing: The Ultimate Guide to Resize PDFs with UPDF

The ability to resize PDF documents is an essential skill. This comprehensive guide provides easy-to-follow steps for various resizing tasks using UPDF, a versatile tool for PDF manipulation. Whether you’re compressing, cropping pages, or images, our guide ensures you can resize PDFs effortlessly.

Part 1. Resize PDFs: What Does the “Resizing” Option Truly Encompass?

When we talk about the option to resize a PDF, it encompasses several distinct scenarios, each addressing a specific need.

  • Firstly, resizing the pages in a PDF is a common requirement, especially when adapting a document to fit a particular printing format or to maintain consistency across multiple files. If this is your goal, Part 3 of our guide offers detailed insights and instructions.
  • Secondly, compressing a PDF is another aspect of resizing. This process reduces the file size, making it more manageable for email attachments or web uploads. For more on this, Part 4 is your go-to section.
  • Lastly, resizing the images within a PDF is crucial when you need to adjust visual elements for clarity or file size reasons. Part 5 will guide you through this process. Each of these scenarios plays a vital role in how you can efficiently resize a PDF to suit your specific needs.

Part 2. The Tool You’ll Need When Resizing a PDF

To efficiently resize a PDF, UPDF stands out as a multifaceted tool ideal for resizing PDFs efficiently. It not only resizes but also compresses PDFs to smaller sizes without losing quality, offers cloud saving for easy sharing, and boasts rapid compression speeds. While free compressions include watermarks, UPDF also ensures security by allowing encryption and locking of compressed files. Beyond resizing, UPDF has more to offer, which we delve into in Part 6 of our guide.

Part 3. How to Resize a PDF: Cut or Crop the Pages in a PDF

Cropping or cutting a PDF page is an essential aspect of resizing a PDF, especially when you need to adjust the visible area of your document for a specific purpose. Here’s how you can crop PDF pages using UPDF:

  1. Open the PDF file in UPDF that you intend to edit. This is your starting point for resizing the PDF.
  2. Once the file is open, click on the “Crop Pages” button located on the left toolbar. This action will activate the cropping tool.
  3. In the cropping mode, a purple box will appear on your document. This box represents the area of the page that will remain after cropping. You can adjust this box to set the margins according to your requirements.
  4. After you have defined the area you want to retain, click the “Crop” button. This will apply your specified changes to the PDF.

Part 4. How to Resize a PDF: Compress or Change the KB Size of a PDF

Compressing a PDF, or changing its kilobyte (KB) size, is a straightforward process using UPDF, a tool designed to efficiently resize PDF files. Here’s a simple step-by-step guide on how to accomplish this:

  1. Start by clicking “Open File” in UPDF. This allows you to upload and open the PDF file you wish to compress.
  2. Once your file is open, select “Save as Other” followed by “Reduce File Size.” Here, you’ll have the option to choose the output document quality, which determines how much the file size is reduced.

3.After selecting the desired quality, click the “Save As” button. You will then choose a location on your computer or network where the compressed PDF file will be saved.

Part 5. How to Resize a PDF: Crop Images in a PDF

Cropping images within a PDF is a vital feature when you need to resize or tailor the visual elements in your document. Here’s how to crop PDF images using UPDF:

  1. Begin by launching UPDF on your computer. In the main interface, click on the “Open File” button to navigate and select the PDF containing the images you wish to crop. This will import the file into the program.
  2. With the document open, activate the editing features by clicking on the “Edit PDF” button located on the left toolbar. This will switch you to editing mode.
  3. In your PDF, navigate to the image you want to modify. Click on the image to select it. A purple border line will appear around the selected image, and several icons will be displayed below it. Choose the “Crop Image” icon or right-click on the image and select “Crop Image” from the context menu.

4. Now, you can define the area of the image you wish to keep by dragging the borders of the crop box. For more precision, you can manually set the width and height dimensions. Once satisfied with the selection, click “OK” to apply the crop.

Part 6. UPDF: More Than an All-in-one PDF Resizer

While UPDF is an effective resizer, it has nearly a dozen other features to help with PDF management. This includes the following:


  1. UPDF AI: UPDF’s AI capabilities enable you to summarize long PDF contents, translate them into different languages, and provide explanations for better understanding.​​.
  2. Convert PDFs: Quickly and accurately convert PDFs to and from various formats like Word, Excel, and more, maintaining the original layout and format integrity​​.
  3. OCR PDF: The advanced OCR feature in UPDF can recognize text in scanned PDFs across 38 languages, making your documents editable and searchable​​.
  4. Batch PDF: Insert a single PDF into multiple files collectively without quality loss​​.
  5. Edit PDF: UPDF allows you to edit text and images in your PDFs as easily as you would in a Word document​​.
  6. Organize PDF: Efficiently manage your PDF pages by extracting, splitting, rotating, reordering, or adding new pages​​.
  7. View PDF: Improve your PDF readability with multiple layouts, including single-page view, two-page view, scrolling, or two-page scrolling
  8. Annotate PDFs: UPDF offers extensive annotation tools, including highlights, text boxes, attachments, and shapes, for an intuitive reading and editing experience​​.
  9. Fill and Sign: Design and add electronic signatures to your PDFs​​.
  10. UPDF Cloud: With the power of cloud computing, you can view your PDF from any device.


As we’ve explored, resizing a PDF is a simple, yet crucial task in managing digital documents. UPDF stands out as a reliable tool, offering a range of options from compressing to cropping, ensuring your PDFs are the perfect fit for any purpose. For seamless and efficient PDF resizing, UPDF is the go-to solution.Get the biggest discount of the year on UPDF Pro + AI now!


About the author

Saman Iqbal

Saman is a law student. She enjoys writing about tech, politics and the world in general. She's an avid reader and writes fictional prose in her free time.

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