.gz is already used by gzip[1]. This wiki[2] says it is .gv . I've always used .dot so I don't know what to use anymore. edit: according to this[3] discussion

.gz is already used by gzip[1]. This wiki[2] says it is .gv . I've always used .dot so I don't know what to use anymore. edit: according to this[3] discussion , Microsoft uses .dot. I then found this wiki[4] page that supports the claim. dot is used by Microsoft Word document template files. I will switch to .gv [1] https://en.wikipedia.org/wiki/Gzip https://en.wikipedia.org/wiki/Gzip [2] https://en.wikipedia.org/wiki/DOT_(graph_description_language) https://en.wikipedia.org/wiki/DOT_(graph_description_languag... [3] https://forum.graphviz.org/t/what-is-the-file-extension-for-dot-file/35 https://forum.graphviz.org/t/what-is-the-file-extension-for-... [4] https://en.wikipedia.org/wiki/List_of_filename_extensions_(A%E2%80%93E) https://en.wikipedia.org/wiki/List_of_filename_extensions_(A... [4]