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How to Flatten a PDF File in Python

Curtis Chau
Curtis Chau
Updated: April 21, 2026

There are scenarios where it is needed to flatten a PDF, which means removing these interactive elements and converting them into a static, non-editable format. In Python, it is possible to achieve this using the IronPDF library. This article will delve into how to flatten a PDF file using IronPDF.

IronPDF

Python is a computer language that helps programmers design graphical user interfaces quickly and easily. Python is also a lot more dynamic for programmers than other languages. As a result, introducing the IronPDF library to Python is a straightforward procedure. To quickly and safely develop a fully functional GUI, a wide range of pre-installed tools, including PyQt, wxWidgets, Kivy, and many other packages and libraries, can be used. We may incorporate a number of features from other frameworks, such as .NET Core, using IronPDF, which does not only support Python. Click here to learn more about Python IronPDF.

IronPDF makes Python web design and development simpler. Django, Flask, and Pyramid are three Python web development paradigms that have seen broad acceptance as a result. Just a handful of the websites and online services that have used these frameworks include Reddit, Mozilla, and Spotify.

IronPDF Features

  • The creation of PDF documents from a variety of sources, including HTML, HTML5, ASPX, and Razor/MVC View, is possible with IronPDF. It provides the option to create PDF files from HTML pages and images.
  • The IronPDF toolkit can assist with a variety of tasks, including creating interactive PDFs, finishing and submitting interactive forms, split and combine PDF files, extracting text and images, searching text within PDF files, rasterizing PDFs to images, changing font sizes, and converting PDF files.
  • With support for user-agents, proxies, cookies, HTTP headers, and form variables, IronPDF provides HTML login form validation.
  • Usernames and passwords are used by IronPDF to grant users access to documents that are secured.
  • IronPDF can print a PDF file from a number of sources, such as a string, stream, or URL, with just a few lines of code.

With the help of IronPDF, it becomes easy to generate flattened PDF documents.

Setup Python

Environment Configuration

Check that Python is installed on your PC. Visit the official Python website to download and install the most recent version of Python that is compatible with your operating system. Once Python is installed, segregate the requirements for your project by creating a virtual environment. The venv module lets you create and manage virtual environments to provide your conversion project a neat, separate workspace.

New Initiative in PyCharm

PyCharm is recommended as an IDE for writing Python code, for this tutorial.

Select "New Project" once the PyCharm IDE has launched.

How to Flatten a PDF File in Python, Figure 1: Create a New Project in PyCharm Create a New Project in PyCharm

When you select "New Project," a new window will open where you can specify the project's environment and location. The image below may help you see this.

How to Flatten a PDF File in Python, Figure 2: Specify the project environment and location Specify the project environment and location

Click the Create button to start a New Project after selecting the Project location and environment path. The software can then be built in the subsequent new window that appears. This tutorial makes use of Python 3.9.

How to Flatten a PDF File in Python, Figure 3: A new Python Project has been successfully created in PyCharm A new Python Project has been successfully created in PyCharm

IronPDF Library Requirement

IronPDF for Python, mostly makes use of .NET 6.0. As a result, in order to utilize IronPDF for Python, your computer has to have the .NET 6.0 runtime installed. Before Linux and Mac users may use this Python module, .NET may need to be installed. To obtain the required runtime environment, go to this download page from Microsoft.

IronPDF Library Installation

To install the ironpdf package necessary to create, edit, and open PDF files, start by opening a terminal in PyCharm and run the following command:

pip install ironpdf

How to Flatten a PDF File in Python, Figure 4: Install the IronPDF package Install the IronPDF package

Generate Flattened PDF using IronPDF

Flattening a PDF can be easily done with the help of IronPDF with just a few lines of code. Below is the source PDF which has text boxes form with a calendar control as a sample PDF file.

How to Flatten a PDF File in Python, Figure 5: Source PDF containing a form with calendar and text box controls Source PDF containing a form with calendar and text box controls

In the PDF form which has three fields, which include two text boxes and one calendar control. It also contains some form field values. Below is the sample code.

from ironpdf import PdfDocument

# Load the PDF document from a specified file path
pdf = PdfDocument.FromFile('F:\\PDF\\EditorDemo.pdf')

# Call the Flatten method to remove all form fields and controls
pdf.Flatten()

# Save the flattened PDF to a new file
pdf.SaveAs("flattenpdf.pdf")
Python

This example begins by importing the ironpdf module, setting the stage to utilize its functionalities for PDF operations. Using PdfDocument.FromFile(), it loads an existing PDF file, allowing various manipulations. The Flatten() method is called to remove interactive elements like form fields, converting them into a static part of the PDF content. Finally, SaveAs() is used to save the modified PDF to a new file, thus completing the flattening process.

How to Flatten a PDF File in Python, Figure 6: The output flattened PDF The output flattened PDF

For more details on Flattened PDF, visit this code link with detailed examples.

Conclusion

The IronPDF library provides robust security methods to minimize risks and ensure data protection. It is compatible with all widely used browsers and is not limited to any particular one. IronPDF allows programmers to easily create and read PDF files with just a few lines of code. To accommodate the various needs of developers, the IronPDF library provides a variety of licensing options, including a free developer license and additional development licenses that are available for purchase.

The $999 Lite package comes with a perpetual license, a 30-day money-back guarantee, a year of software support, and upgrade possibilities. Beyond the initial purchase, there are no more costs. Production, staging, and development environments all make use of these licenses.

IronPDF also offers free licenses with a few time and redistribution limitations. During the trial license period, users can evaluate the product in actual use without a watermark. For more information on how much the IronPDF trial edition costs and how to license it, please click the following licensing page.

Curtis Chau
Technical Writer

Curtis Chau holds a Bachelor’s degree in Computer Science (Carleton University) and specializes in front-end development with expertise in Node.js, TypeScript, JavaScript, and React. Passionate about crafting intuitive and aesthetically pleasing user interfaces, Curtis enjoys working with modern frameworks and creating well-structured, visually appealing manuals.

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