Comment by abhinavsharma

We built something a while ago that lets you do this on top of an existing search engine like Google.

https://chrome.google.com/webstore/detail/hypersearch/feojag...

It's 100% open source and client-side https://github.com/abhinavsharma/hypersearch

I wrote a post explaining why we think this is a more pragramtic approach here https://abhinavsharma.com/blog/google-alternatives