https://dirtylittlesql.com and https://io10.dev also support this.
Some kind of fork of DirtyLittleSQL looks like it is the solution!
Can you expand on this? How would people express the searches and filters? SQL? or some other way?
Assuming SQL, all the work's done for you already! :D A single static page that serves sqlite3-in-wasm to the client browser, with, I donno, A text box to enter SQL queries and a file picker.