PyXLL - Python for Excel Solution

For organizations who want to provide Python-based algorithms and analyses to end-users in Excel, PyXLL makes Python a performant, flexible back-end for Excel worksheets. PyXLL streamlines deployment from R&D to end users to greatly reduce time-to-value for new strategies and algorithms. Teams in investment banks, hedge funds and engineering organizations worldwide are using PyXLL to bring the full power of the Python ecosystem to their Excel end-users.

  • Increase productivity by using a modern dynamic language - Python.
  • Reduce risk by storing code in version control instead of embedded in Excel.
  • Deploy code updates more easily to Excel users with centralized code.
  • Reduce coding iteration cycles by removing the compile-and-restart step usually associated with C++ add-ins.
  • Improve productivity and performance using the full Python ecosystem: Numpy, Pandas, SciPy and the full SciPy stack.
See how PyXLL makes it easy to write Excel add-ins to leverage the capabilities of Python within the familiar Excel user interface.

Easily Write Excel Add-ins

PyXLL makes it possible to write add-ins for Microsoft Excel in Python. Using simple decorators, your Python code can instantly be exposed to Excel as worksheet functions, menu items or macros. Excel add-ins written using PyXLL are fast to develop, offer high performance and are easier to maintain and deploy than other methods of developing Excel add-ins.

Technical Requirements and Features

Recent versions of Microsoft Excel for Windows are supported, including Excel 2003, Excel 2007, Excel 2010 and Excel 2013 (both 32-bit and 64-bit versions of Excel 2010 and Excel 2013 are supported). PyXLL is not available for Microsoft Excel for Mac or other spreadsheet applications.

PyXLL is designed to work with all versions of Python from 2.3 to 3.3 (CPython). The standard CPython interpreter ensures compatibility with compiled CPython modules such as SWIG, Boost and Cython, as well as 3rd party packages such as NumPy, Pandas and the rest of the SciPy stack.


  • Write Excel worksheet functions in Python, which are then automatically included in the Excel Function Wizard with their Python docstrings
  • Write Excel macros in Python
  • Add menu items to Excel from Python
  • Reload and test without restarting Excel
  • Run PyXLL code outside of Excel (for unit testing, etc.) via stubs PyXLL module
  • Use win32com for calling back into Excel from PyXLL modules and for Excel event handling
  • Support for:
    • NumPy data types
    • Non-standard data types with a customizable type system
    • Large array types in Excel 2007, 2010, and 2013
    • Unicode in Excel 2007, 2010, and 2013
    • Asynchronous functions in Excel 2010 and 2013