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Convert HTML to OST in Java

Native HTML to OST conversion using Java Email library, without needing any additional software.

How to Convert HTML to OST Using Java

In order to render HTML to OST, we’ll use

Aspose.Email for Java

API which is a feature-rich, powerful and easy to use conversion API for Java platform. You can download its latest version directly from


and install it within your Maven-based project by adding the following configurations to the pom.xml.


<name>Aspose Java API</name>


<version>version of aspose-email API</version>

Steps to Convert HTML to OST via Java

Java programmers can easily convert HTML file to OST in just a few lines of code.

  • Load HTML file with Aspose.Email for Java MailMessage.load.
  • Call the save() method.
  • Pass the output file path with (OST) file extension.
  • Open OST file in compatible program.

System Requirements

Before running the Java conversion code, make sure that you have the following prerequisites.

  • Microsoft Windows or a compatible OS with Java Runtime Environment for JSP/JSF Application and Desktop Applications.
  • Get latest version of Aspose.Email for Java directly from Maven .

Convert HTML to OST - Java

// load the HTML file to be converted
MailMessage message = MailMessage.load("sourceFile.html"); 
// save HTML as a OST"Saved File.ost", SaveOptions.DefaultOst);    
  • HTML to OST Conversion Live Demos

    Other Supported Conversions

    You can also convert HTML into many other file formats including few listed below.

    HTML TO EML (Outlook Email Messages)
    HTML TO EMLX (Apple EMLX Format)
    HTML TO ICS (iCalendar)
    HTML TO MBOX (Electronic Mail Messages)
    HTML TO MHTML (Web Page Archive Format)
    HTML TO MSG (Outlook & Exchange Format)
    HTML TO OFT (Outlook Email Templates)
    HTML TO PST (Outlook Personal Storage Files)
    HTML TO VCF (Virtual Card Format)