Currently the REST API can download workbooks but cannot export pdfs. I believe you want to upvote the idea here:
However, the workarounds here may help:
Hope this helps,
Thanks for the reply guys! I want to render view as a pdf and I am using JS API. I don't want to use tabcmd or other options because I want to dynamically apply filters asynchronously on the workbook and JS API provides me a way to do it.
I am able to render the pdf using JS API but getting the following error: Could not load 'tableau.nls.clientweb_en-us'