[magnio]

You can change github.com to github1s.com to get VSCode in browser with fairly capable search without logging in. E.g. https://github1s.com/nginx/nginx

[oefrha]

I believe the search there uses Sourcegraph, so you can also search directly at https://sourcegraph.com/search. E.g. https://sourcegraph.com/search?q=repo:github.com/nginx/nginx...

[nullify88]

Alternatively the official site is vscode.dev.

[bityard]

That requires you to sign into github to open a github repo, which is what the OP was trying to avoid.

[KTibow]

Or github.dev