Lesending lets you choose a publish target while editing: local site only, local plus remote, or remote only (after a successful sync the local post is saved as a draft and the mode resets to local only).

This plugin is developed by Lezaiyun Studio and maintained by LaoJiang.

Official product page: https://www.lezaiyun.com/lesending.html

Developer blog: https://www.laojiang.me

Connection modes

REST + Application Passwords: for sites with a working WordPress REST API. The plugin auto-detects /wp-json, /index.php/wp-json, and index.php?rest_route= endpoints.
Bridge file: when remote REST is restricted, upload a standalone PHP bridge to the remote WordPress root and authenticate with a shared secret.

Editor

Gutenberg sidebar panel
Classic editor meta box
Sync log meta box with per-site results

Media sync

Toggle image sync in plugin settings
When enabled, content images and the featured image are uploaded to the remote media library and URLs are rewritten
Supports REST media upload and bridge sideload

Settings

Card-style remote site list
Connection test for REST and bridge modes
Bridge script download (optional custom .php filename)

Uninstalling the plugin removes options and related post meta (see uninstall.php).