WP Launcher spins up isolated WordPress sites on demand — pre-loaded with your plugins and themes. Local dev: Docker-based, choose PHP (8.1–8.3) + database (SQLite/MySQL/MariaDB) per site. Wildcard subdomains, built-in email testing, live PHP config. Agency demos: Sites launch in ~10 seconds, auto-expire, sandboxed with capability restrictions. Perfect for client demos. Open source. Self-hosted. One-click VPS installer.