A simple and practical countdown website

A simple and practical online countdown website. You just need to enter the countdown deadline on the homepage, then click "GO" to enter the countdown page. At this point, the black border around the page will gradually fill up as time passes. When the preset time is reached, the website will give an audio reminder. You can also directly add time after the URL to start timing, for example, "e.ggtimer.com/30" means a default 30-second countdown. If you replace 30 with 1hour23minutes, it represents 1 hour and 23 minutes.