Daily Godot Tip #17: If you need to test your game on web, instead of exporting and uploading to something like itch.io, Godot has a built in Run in Browser button - eviltoast

This will be available to click on if you have a web export template

Alt text: Clicking on the Remote Debug button in the top right of the Godot Editor and a menu popping up that says Run in Browser on a button, and then Start HTTP Server on a button