Wubular

Wubular is a modern re-imagining of Rubular, built with Ruby compiled to WebAssembly.
It lets you compose and test Ruby regular expressions directly in your browser — no backend server required.

Running locally

Because browsers block WASM loading over file://, you’ll need to serve it over HTTP.

The simplest way is to use Ruby’s built-in HTTP server:

ruby -run -e httpd . -p 1234

Then open:

http://localhost:1234/

That’s it — you now have Wubular running in your browser. 🚀

Running tests

Append ?run_test to the URL and open the browser console. You’ll see the full Minitest suite running natively inside your browser.

Example:

http://localhost:1234/?run_test