Heyo!
I've only recently dug into the big world of Unicode, but when doing so, I found the tools available sorely lacking. Most were server-side or needed to be downloaded and had confusing interfaces and buggy behavior.
The solution was to build my own. Turns out it's super easy to just download a 1.9MB text file and parse it using JavaScript. The entire application is client-side, so requests are quick and technically work offline.
Right click a symbol to copy it. Left click to open more information about it.
Simple Search is the default. Click the button in the upper right to do some more sophisticated filtering with "Advanced Search".
I'll probably make it a PWA once I figure out how to properly do cache busting.
On a different note, I don't know many people who are interested in Unicode lookup tools and/or those who use such tools regularly. I've added in features that I personally found useful, but do let me know if there are killer features you'd like for it to have.
source at https://github.com/EmNudge/unicode-lookup