Apply a license key in IronXL for Python

Updated: April 22, 2026

The license key is a long string that ends with an expiry date. Please ensure this is copied correctly, with no spaces.

# Apply the license key to the IronXL library
# Replace 'YOUR_LICENSE_KEY' with your actual license key string
IronXL.License.Key = "IRONXL-MYLICENSE-KEY-RENEW.SUPPORT.01.JAN.2050"

# Apply the license key to the IronXL library
# Replace 'YOUR_LICENSE_KEY' with your actual license key string
IronXL.License.Key = "IRONXL-MYLICENSE-KEY-RENEW.SUPPORT.01.JAN.2050"

Python

The most robust method of applying a license key is directly in your code, before the library is called.

# Set the license key for the IronXL library at the start of your program
# This helps to ensure that the library recognizes your license as soon as it is needed
IronXL.License.Key = "IRONXL-MYLICENSE-KEY-RENEW.SUPPORT.01.JAN.2050"

# Set the license key for the IronXL library at the start of your program
# This helps to ensure that the library recognizes your license as soon as it is needed
IronXL.License.Key = "IRONXL-MYLICENSE-KEY-RENEW.SUPPORT.01.JAN.2050"

Python

For more options, including configuration via web.config and appsettings.json, please see the following FAQ page for more information:

IronXL License Keys - FAQs

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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