Erick Hitter

WordPress 3.0 introduced a native shortlinks feature, which builds URLs using query strings. This plugin converts those URLs to ones using pretty permalinks, which makes for a nicer-looking URL and improves shortlinks’ ability to be cached.
Posts and pages are supported by default, while filters make it possible to support other post types.
For example, https://example.com/?p=123 becomes https://example.com/p/123/.

ETH Simple Shortlinks

Convert WordPress's query-based shortlinks to pretty permalinks that are cacheable. https://example.com/?p=123 becomes https://example.com/p/123/.

Shivanand Sharma

Ruchika Karda

WP Shortlinker will help you achieve actual permanent links when inserting links in WordPress editor by changing the internal links to use shortlinks instead of permalinks.
Once you have installed and activated the plugin, you can go ahead and try inserting a link into WordPress editor from the kitchen sink. The plugin will automatically change it to the shortlink.

WP Shortlinker

WP Shortlinker changes the internal links to use shortlinks instead of permalinks inside the WordPress editor.

ETH Simple Shortlinks vs WP Shortlinker