This articles describes using google collab as a free way to have vscode running in the cloud. Tried it out and seems to work (caveat is that the default setup with a password did not work for me). It doesn't have access to any extension marketplace by default. That being said, with the right bootstrap script, you could probably get a free version of Dendron running in the cloud :D https://amitness.com/vscode-on-colab/