How to Apply a License Key in IronOCR

Curtis Chau

Updated: May 9, 2026

Download IronOCR

• NuGet Download
• DLL Download
• Windows Installer

• ---

• Start Free Trial

Copy for LLMs

• Copy for LLMs

  Copy page as Markdown for LLMs
  # How to Apply a License Key in IronOCR The license key is a long string that ends with an expiry date. Please ensure this is copied correctly, with no spaces. ```txt IRONOCR-MYLICENSE-KEY-1EF01-RENEW.SUPPORT.01.JAN.2050 ``` The most robust method of applying a license key is directly in your code, before the library is called. ```csharp // Set the license key for IronOCR before using the library IronOcr.Installation.LicenseKey = "IRONOCR-MYLICENSE-KEY-RENEW.SUPPORT.01.JAN.2050"; ``` For more options, including setting the license key in `web.config` and `appsettings.json`, please see this FAQ page for more information: [IronOCR License Keys FAQ](https://ironsoftware.com/csharp/ocr/get-started/license-keys/)

• ---

• Open in ChatGPT

  Ask ChatGPT about this page
• Open in Gemini

  Ask Gemini about this page
• Open in Grok

  Ask Grok about this page
• Open in Perplexity

  Ask Perplexity about this page

Share

• Share on Facebook
• Share on X (Twitter)
• Share on LinkedIn

• ---

• Email article

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

IRONOCR-MYLICENSE-KEY-1EF01-RENEW.SUPPORT.01.JAN.2050

IRONOCR-MYLICENSE-KEY-1EF01-RENEW.SUPPORT.01.JAN.2050

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

// Set the license key for IronOCR before using the library
IronOcr.Installation.LicenseKey = "IRONOCR-MYLICENSE-KEY-RENEW.SUPPORT.01.JAN.2050";

// Set the license key for IronOCR before using the library
IronOcr.Installation.LicenseKey = "IRONOCR-MYLICENSE-KEY-RENEW.SUPPORT.01.JAN.2050";

' Set the license key for IronOCR before using the library
IronOcr.Installation.LicenseKey = "IRONOCR-MYLICENSE-KEY-RENEW.SUPPORT.01.JAN.2050"

' Set the license key for IronOCR before using the library
IronOcr.Installation.LicenseKey = "IRONOCR-MYLICENSE-KEY-RENEW.SUPPORT.01.JAN.2050"

For more options, including setting the license key in web.config and appsettings.json, please see this FAQ page for more information:

IronOCR License Keys FAQ

Curtis Chau

Chat with engineering team now

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.

...

Read More