A quick, easy way to notify your users when they are leaving your site. You can edit the content and add domain exclusions.
As of April 2026, Casper’s Leave Notice is a WordPress exit warning plugin with 200 active installations and a 5/5 rating from 5 reviews. It has been downloaded 4.4K+ times in total. Requires WordPress 4.0+ and PHP false+. Available on WordPress.org since 2016. Last updated 6 years ago — may have compatibility concerns.
Casper’s Leave Notice warns your users when they are about to leave your website. All you have to do is install and activate, and the plugin does the rest! You can edit the content that shows up in the pop up window to fine tune the message your users see. You can also add domain names to exclude from the pop up.
For example, if a link sends your users to a third party tool – like a shopping cart – just add the domain to the exclusion list and your guests will be none the wiser.
| WordPress | 4.0+ requiredTested up to 5.2.24 |
| PHP | false+ required |
Plugin data sourced from WordPress.org. Analysis and metrics by PluginSift.