SQL Sentry Plan ExplorerSQL Sentry Plan Explorer 
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SQL Sentry Plan Explorer (SQL Sentry Plan Explorer.exe). Free application for query tuning through deep but intuitive execution plan analysis.
Advanced, lightweight SQL execution plan analysis for faster, clearer, and more efficient query tuning
This free, standalone tool delivers deep yet intuitive analysis of SQL execution plans, helping you tune queries with greater accuracy and speed. Built to enhance the graphical plan view in SQL Server Management Studio (SSMS), it streamlines performance troubleshooting and provides the clarity developers and DBAs need for daily optimization workflows. Designed for simplicity, it requires no collector service or supporting database.
Plan Explorer incorporates many powerful features first introduced in SQL Sentry v6 while remaining lightweight and easy to install. With improved visual insights, cost analysis, and query diagnostic detail, it supports modern performance tuning practices, including cloud database optimization and large-scale workload analysis. Ideal for teams seeking a fast query tuning tool, SQL execution plan viewer, or database performance analysis solution.