Resizing PDFs is helpful when you need to change page dimensions or optimize the layout for different devices. In this guide, you will learn how to resize PDF pages using an online tool and how to resize pages of a PDF document programmatically in C#, Java, and Python.

Let’s begin with the free online PDF resize tool built with Aspose.PDF.

Resizing PDFs Online for Free

Use the free online PDF resize tool to quickly change the page size of any PDF document. This tool helps you resize PDFs into standard page sizes.

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Upload your file, select a target page size or scale, and download the resized PDF instantly.

This online tool is powered by the same Aspose.PDF library used in the code examples in the upcoming section. You get the same precision and control whether you use it online or programmatically.

How to Resize a PDF Online

  1. Go to the Aspose PDF Resize Tool.
  2. Drop or upload your PDF file.
  3. Choose a standard page size from the dropdown.
  4. Click the Resize button.
  5. Download the modified PDF.

All files are automatically deleted within 24 hours. Aspose doesn’t access or store your documents.

Resizing PDFs Using Aspose.PDF

Aspose.PDF is a powerful and flexible library designed for working with PDF files across multiple platforms, including .NET, Java, and Python. When it comes to resizing PDFs, it offers complete control over page dimensions and content scaling. Whether you want to reduce a PDF size, convert pages to standard sizes like A4 or Letter, or optimize documents for web or mobile viewing, Aspose.PDF makes the process simple and efficient. With just a few lines of code, developers can resize individual pages or entire PDF files programmatically without relying on third-party tools or Adobe Acrobat.

Resize PDF Document Using C#

You can resize PDF pages using Aspose.PDF for .NET. This is useful when you want to change a PDF page size or match pages to specific dimensions.

Step 1: Install the Library

Install from NuGet:

PM> Install-Package Aspose.PDF

Step 2: Use the Code to Resize Pages

Here is a C# example that resizes all pages to A3:

Check out our detailed blog post about changing PDF page size in C#.

Resizing PDFs Using Java

Aspose.PDF for Java offers full support for page resizing as shown below.

Step 1: Add the Dependency

Add the following to your pom.xml:

<dependency>
    <groupId>com.aspose</groupId>
    <artifactId>aspose-pdf</artifactId>
    <version>25.7</version><!-- Use the latest version -->
</dependency>

Step 2: Resize PDF Pages in Java

Here is a simple example to resize PDF page size in Java:

Read more about how to edit PDF page size in Java.

Resize PDF File in Python

With Aspose.PDF for Python, you can easily resize pages of a PDF document or change page dimensions.

Step 1: Install the Library

Use pip to install:

pip install aspose-pdf

Step 2: Run the Script for Resizing PDFs

This Python code sets customized height and width for all the pages of a PDF document:

Discover how to resize a PDF document in Python using Aspose.PDF.

Get a Free License

Do you want to try Aspose.PDF without limits? Please get a free temporary license and unlock full features. It lets you resize, compress, and manipulate PDFs without any restrictions.

Resize PDF: Free Resources

Explore more tools and documentation:

Conclusion

In this post, you explored how to resize PDF documents using a free online tool and understood how the resizing process works behind the scenes. You also learned how to implement PDF resizing programmatically in C#, Java, and Python using Aspose.PDF. Whether you are resizing PDFs, adjusting document layout, or optimizing it for screen or print, Aspose.PDF provides you with the tools and flexibility to handle it all efficiently.

Have questions? Reach out anytime at our free support forum.

See Also