npm install groupdocs-conversion-cloud

const { ConversionApi, Configuration } = require('groupdocs-conversion-cloud');

const config = new Configuration({
    clientId: 'YOUR_CLIENT_ID',
    clientSecret: 'YOUR_CLIENT_SECRET'
});

const conversionApi = new ConversionApi(config);

const fs = require('fs');
const path = require('path');

const htmlPath = path.resolve(__dirname, 'sample.html');
const fileBytes = fs.readFileSync(htmlPath);

const uploadResponse = await conversionApi.uploadFile({
    file: fileBytes,
    fileName: 'sample.html'
});
const sourceFileId = uploadResponse.id;

const convertSettings = {
    outputFormat: 'DOCX',
    options: {
        embedFonts: true,
        pageSize: 'A4',
        marginTop: 20,
        marginBottom: 20,
        marginLeft: 15,
        marginRight: 15
    }
};

const convertResponse = await conversionApi.convert({
    fileId: sourceFileId,
    convertSettings: convertSettings
});
const docxFileId = convertResponse.id;

const docxData = await conversionApi.downloadFile({ fileId: docxFileId });
fs.writeFileSync(path.resolve(__dirname, 'output.docx'), docxData);
console.log('DOCX file saved as output.docx');

// Full working example for HTML to DOCX conversion using GroupDocs.Conversion Cloud SDK for Node.js

const { ConversionApi, Configuration } = require('groupdocs-conversion-cloud');
const fs = require('fs');
const path = require('path');

async function convertHtmlToDocx() {
    // 1. Configure the API client
    const config = new Configuration({
        clientId: 'YOUR_CLIENT_ID',
        clientSecret: 'YOUR_CLIENT_SECRET'
    });
    const conversionApi = new ConversionApi(config);

// 2. Read the HTML file
    const htmlPath = path.resolve(__dirname, 'sample.html');
    const htmlBytes = fs.readFileSync(htmlPath);

// 3. Upload the HTML file
    const uploadResult = await conversionApi.uploadFile({
        file: htmlBytes,
        fileName: 'sample.html'
    });
    const sourceFileId = uploadResult.id;

// 4. Define conversion settings
    const convertSettings = {
        outputFormat: 'DOCX',
        options: {
            embedFonts: true,
            pageSize: 'A4',
            marginTop: 20,
            marginBottom: 20,
            marginLeft: 15,
            marginRight: 15
        }
    };

// 5. Perform the conversion
    const convertResult = await conversionApi.convert({
        fileId: sourceFileId,
        convertSettings: convertSettings
    });
    const docxFileId = convertResult.id;

// 6. Download the DOCX file
    const docxBytes = await conversionApi.downloadFile({ fileId: docxFileId });
    const outputPath = path.resolve(__dirname, 'output.docx');
    fs.writeFileSync(outputPath, docxBytes);
    console.log(`Conversion successful. DOCX saved to ${outputPath}`);
}

// Execute the conversion
convertHtmlToDocx().catch(err => {
    console.error('Conversion failed:', err);
});

curl -X POST "https://api.groupdocs.cloud/v2.0/oauth2/token" \
     -H "Content-Type: application/x-www-form-urlencoded" \
     -d "grant_type=client_credentials&client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET"

curl -X POST "https://api.groupdocs.cloud/v2.0/storage/files/sample.html" \
     -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
     -F "file=@sample.html"

curl -X POST "https://api.groupdocs.cloud/v2.0/conversion/convert" \
     -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
     -H "Content-Type: application/json" \
     -d '{
           "sourceFilePath": "sample.html",
           "outputFilePath": "output.docx",
           "outputFormat": "DOCX",
           "options": {
               "embedFonts": true,
               "pageSize": "A4"
           }
         }'

curl -X GET "https://api.groupdocs.cloud/v2.0/storage/files/output.docx" \
     -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
     -o output.docx

const convertSettings = {
    outputFormat: 'DOCX',
    options: {
        embedFonts: true,
        pageSize: 'Letter',
        marginTop: 30,
        marginBottom: 30,
        marginLeft: 20,
        marginRight: 20
    }
};