How to hide Save button and Document name of PDF file viewed on web page using Embed API

Sorry I forgot about part of your question. Technically you can't hide the name part, and you can't pass an empty string to the name, but, you can pass a string of one blank space. This CodePen demonstrates it: https://codepen.io/cfjedimaster/pen/MWEpvME

You can turn off annotations which is the only way to edit the PDF. That will remove this. If you want to remove download completely, you can turn off the download feature as well. Here's how that code could look:

<div id="adobe-dc-view"></div>
<script src="https://documentcloud.adobe.com/view-sdk/main.js"></script>
<script type="text/javascript">
	document.addEventListener("adobe_dc_view_sdk.ready", function(){ 
		var adobeDCView = new AdobeDC.View({clientId: "<YOUR_CLIENT_ID>", divId: "adobe-dc-view"});
		adobeDCView.previewFile({
			content:{promise: "<FILE_BLOB_PROMISE>"},
			metaData:{fileName: "<FILE_NAME>"}
		}, {showAnnotationTools: false, showDownloadPDF: false});
	});
</script>