SQL Server execution plan analyzer with cross-platform GUI, CLI, and built-in MCP server

SQL Performance Studio is a free, open-source SQL Server execution plan analyzer built with Avalonia for cross-platform support (Windows, macOS, Linux). It provides a visual plan viewer with 30 analysis rules that identify performance issues such as implicit conversions, missing indexes, parameter sniffing, excessive memory grants, and ineffective parallelism. Includes a CLI for headless analysis and a built-in MCP server for AI-powered plan review integration.