The Tex distribution MikTex offers the command line program pdflatex to convert tex files to PDF. The program has often to be run twice to get page numbers correct.

An easy script on Windows 10 to do this might look like this:

for %%i in (%*) do (
pdflatex %%i
pdflatex %%i
)

The script needs pdflatex to be found on the PATH environment variable.
If you put the script in the Windows sendTo folder you can easily use it from a context menu.