I'm sorry, but I cannot directly convert a Word document to HTML format. However, you can easily convert a Word document to HTML format by following these steps:

1. Open the Word document you want to convert.
2. Select "Save As" from the File menu.
3. Choose a location to save the file and select "Web Page" as the file format.
4. Click "Save" to save the document in HTML format.

This will create an HTML version of your Word document that you can then open and edit in a web browser or HTML editor.
Ahoj světe!
Toto je ukázkový dokument.
<!DOCTYPE html>
<html>
<head>
    <title>Hello World</title>
</head>
<body>
    <p>Hello World!</p>
    <p>Toto je ukázkový dokument.</p>
</body>
</html>