Compare PDF files in Python

Powerful Python library to compare PDF documents and detect even small differences

Compare two PDF files in Python using our difference checker. With our high-fidelity Python via .NET API, you can find the difference between compared PDF documents and export the results to a convenient file format.

View code snippet

With this native Python via .NET API, you can easily compare PDF documents and obtain the differences in the desired output format. Our Python library is fully self-contained and does not rely on any external tools or services. It eliminates the need for external dependencies, providing a comprehensive set of PDF processing functionalities within a single Python via .NET package.

On this landing page, we bring you a live demo of the PDF comparison in action, coupled with an illustrative Python example. It compares the contents of PDF documents both at the character level and at the word level. Even if only a single character has been changed, the entire word will be marked as modified. Experience firsthand how easy it is to compare two documents by uploading PDF files to the interface, choosing the desired output format, and getting the differences between PDF documents marked with 100% accuracy.

Compare Model.Name1 using Python

Sometimes it may not be clear if a PDF file has been modified, and manually comparing two versions of a document can be a daunting task. Conversely, there are times when you're sure the PDF document has changed, but visually identifying the updated sections becomes overwhelming. The PDF comparison is an increasingly sought-after procedure, particularly within automated document workflows. Let's explore typical scenarios where automated PDF comparison can be highly valuable:

  • Version Control and Collaboration. When multiple contributors are working on the same PDF file, programmatic document comparison helps identify changes made by different individuals
  • Legal and Compliance. In the legal industry, accurate comparison of legal contracts, agreements, or regulatory documents is crucial. Automated PDF file comparison ensures precise detection of any modifications, additions, or omissions, helping legal professionals maintain compliance and mitigate legal risks
  • Quality Assurance and Testing. Software development often involves handling extensive documentation, such as requirements, specifications, and test cases. By automating PDF comparison, Python via .NET developers can easily detect discrepancies between versions, ensuring consistency and accuracy throughout the development process
  • Content Management and Publishing. In content-driven industries, like publishing or journalism, maintaining consistency across different versions of articles, manuscripts, or books is essential. Comparing PDF documents programmatically allows authors and editors to quickly spot differences and ensure the integrity of their content, facilitating efficient publishing workflows

Find differences in PDF files in Python

As you can see, programmatic PDF comparison offers immense benefits in various domains, enabling streamlined workflows, enhanced collaboration, and increased productivity. With this Python API, you have the power to harness these advantages seamlessly within your Python via .NET projects. Try out our live demo by uploading two PDF documents, selecting the target format to highlight the differences, and examining the Python code example. This Python snippet demonstrates how to find differences between PDF files and save the results in the required format.

An important point: the compared PDF documents should not have revisions before calling the comparison method. You must first accept all the revisions.

Compare two PDF files using Python
Upload the compared file
Run code
Upload the second file to compare
Select the target format from the list
import aspose.words as aw

docA = aw.Document("Input1.pdf")
docB = aw.Document("Input2.pdf")

# There should be no revisions before comparison.
docA.accept_all_revisions()
docB.accept_all_revisions()

docA.compare(docB, "Author Name", datetime.now())
docA.save("Output.pdf")
Run code

How to compare two PDF in Python

  1. Install 'Aspose.Words for Python via .NET'
  2. Add a library reference (import the library) to your Python project
  3. Load two PDF to compare
  4. Accept all revisions before calling the 'compare()' method
  5. Call the 'compare()' method to compare two PDF
  6. Call the 'Save()' method, passing an output filename with required extension
  7. Get the result of compression PDF as a separate file

Python library to compare PDF documents

We host our Python packages in PyPi repositories. Please follow the step-by-step instructions on how to install "Aspose.Words for Python via .NET" to your developer environment.

System Requirements

This package is compatible with Python ≥3.5 and <3.12. If you develop software for Linux, please have a look at additional requirements for gcc and libpython in Product Documentation.

Other supported file formats

You can perform compare operation for other file formats:

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