Error: Failed to Locate IronPDF in Python

Updated:June 8, 2025

Assuming you have installed the .NET 6.0 SDK and IronPdf via pip using the following command:

 pip install ironpdf

You may encounter the exception below upon executing the Python script:

Exception has occurred: Exception
Failed to locate IronPdf.Slim.dll at 'C:\Users\Name\AppData\Local\Programs\Python\Python311/IronPdf.Slim'. Please see /troubleshooting/quick-ironpdf-troubleshooting/ for more information
  File "C:\Users\Name\OneDrive\Documents\IronPdfPythonNew\working\viewport.py", line 1, in <module>
    from ironpdf import *
Exception: Failed to locate IronPdf.Slim.dll at 'C:\Users\Name\AppData\Local\Programs\Python\Python311/IronPdf.Slim'. Please see https://ironpdf.com/troubleshooting/quick-ironpdf-troubleshooting/ for more information

Solution

The directory that contains IronPdf.Slim can be specified as follows:

import sys
# Set the path to include the directory containing the IronPdf.Slim files.
# Users can determine this location by running `pip uninstall ironpdf` and pressing `N` to view the installation path.
sys.path.append('/path/to/python/packages')

import sys
# Set the path to include the directory containing the IronPdf.Slim files.
# Users can determine this location by running `pip uninstall ironpdf` and pressing `N` to view the installation path.
sys.path.append('/path/to/python/packages')

PYTHON

For Example

import sys
# Add the directory of the IronPdf installation to the path for module resolution.
# This should point to the root directory of where IronPdf is installed.
sys.path.append(r'C:\Users\lyty1\AppData\Local\Programs\Python\Python311\Lib\site-packages')

from ironpdf import *

# Instantiate Renderer
renderer = ChromePdfRenderer()

# Create a PDF from a URL or local file path
pdf = renderer.RenderUrlAsPdf("https://ironpdf.com/")

# Export to a file or Stream
pdf.SaveAs("url.pdf")

import sys
# Add the directory of the IronPdf installation to the path for module resolution.
# This should point to the root directory of where IronPdf is installed.
sys.path.append(r'C:\Users\lyty1\AppData\Local\Programs\Python\Python311\Lib\site-packages')

from ironpdf import *

# Instantiate Renderer
renderer = ChromePdfRenderer()

# Create a PDF from a URL or local file path
pdf = renderer.RenderUrlAsPdf("https://ironpdf.com/")

# Export to a file or Stream
pdf.SaveAs("url.pdf")

PYTHON

Reason

Most third-party libraries are installed in a directory called "site-packages," which is located either within the Python installation directory or within the virtual environment directory if you're using virtual environments. This is the directory accessible by your Python interpreter.

IronPDF will install both IronPdf.Slim and IronPdf.Native.Chrome.Windows.

The exact location can vary depending on the operating system and your Python configuration.

Curtis Chau

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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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