after the file is converted to pdf, then preview pdf

it is recommended that you directly use the parsing service provided by Microsoft. It is very convenient and effective.

is also super easy to use, just refer to the absolute address of the office file directly. Like this:

https://view.officeapps.live.com/op/view.aspx?src=http://www.a.com/test.doc

where http://www.a.com/test.doc is the absolute address of the document. Call the spliced address directly to iframe, and you can see the effect. Try it

Note: all files of office series can be previewed. Documents, tables and ppt are all right.

htt://www.dongyao.ren

Technology Stack
php exec/shell
Liboffice converts office files pdf
Firefox's open source project pdf.js