import com.groupdocs.conversion.Converter;
import com.groupdocs.conversion.options.convert.HtmlConvertOptions;
import java.io.File;

public class HtmlConversionDemo {
    public static void main(String[] args) {
        // Input document (any supported format: .docx, .pdf, .pptx, etc.)
        String inputPath = "input.docx";

// Output HTML file
        String outputPath = "output.html";

// Folder where images and other resources will be stored
        String resourcesFolder = "output_resources";

// Ensure the resources folder exists
        File resFolder = new File(resourcesFolder);
        if (!resFolder.exists()) {
            resFolder.mkdirs();
        }

Converter converter = null;
        try {
            // Initialize the converter with the source document
            converter = new Converter(inputPath);

// Configure HTML conversion options
            HtmlConvertOptions htmlOptions = new HtmlConvertOptions();

// Store images and CSS in a separate folder
            htmlOptions.setResourcesFolder(resourcesFolder);
            htmlOptions.setResourcesFolderName("resources");

// Do not embed images directly into HTML (keeps file size lower)
            htmlOptions.setEmbedImages(false);

// Convert the whole document (0 means all pages)
            htmlOptions.setPageNumber(0);

// Produce a single HTML file (all pages merged)
            htmlOptions.setRenderToSinglePage(true);

// Image quality for extracted pictures (0‑100)
            htmlOptions.setQuality(90);

// Performance tweaks for large documents
            htmlOptions.setMaxPages(0); // 0 = no limit
            htmlOptions.setUsePdfRender(true); // use PDF renderer when possible

// Perform the conversion
            converter.convert(outputPath, htmlOptions);

System.out.println("HTML file created successfully at: " + outputPath);
        } catch (Exception ex) {
            System.err.println("Conversion failed: " + ex.getMessage());
            ex.printStackTrace();
        } finally {
            // Release native resources
            if (converter != null) {
                try {
                    converter.close();
                } catch (Exception ignored) {
                }
            }
        }
    }
}

converter = new Converter(inputPath);

HtmlConvertOptions htmlOptions = new HtmlConvertOptions();
htmlOptions.setResourcesFolder(resourcesFolder);
htmlOptions.setResourcesFolderName("resources");
htmlOptions.setEmbedImages(false);
htmlOptions.setRenderToSinglePage(true);

htmlOptions.setMaxPages(0);
htmlOptions.setUsePdfRender(true);

converter.convert(outputPath, htmlOptions);

if (converter != null) {
    converter.close();
}

<repositories>
    <repository>
        <id>conholdate-repo</id>
        <name>Conholdate Maven Repository</name>
        <url>https://repository.conholdate.com/repo/</url>
    </repository>
</repositories>

<dependency>
    <groupId>com.conholdate</groupId>
    <artifactId>conholdate-total</artifactId>
    <version>24.9</version>
    <type>pom</type>
</dependency>