See https://filterdemo.rclone.org/ for the website which allows you to try out rclone filters on a set of file names.
This compiles the filters part of rclone into a WASM module and imports it into the browser along with a bit of user interface (also written in Go).
Build the code with:
./build
Run a webserver to serve it:
./serve &
Then go to http://localhost:3000/