Convert .3mx to .imodel

Hi,

is there any chance to convert .3mx model to .imodel format?

My client wants me to use his .3mx models with iModel.js library. As I understand from iModel documentation, accepted extensions to upload are .bim and .imodel. I've tried to publish .3mx to .imodel using Bentley View CONNECT Edition already, but when I open a project in connect.bentley.com under ProjectWise tab, there is no model, just a skybox. Maybe there is a chance to convert .3mx to some different format first and then to .imodel? Thanks in advance.