
Hey Why: SQL Explain Viewer
Understand MYSQL execute plan
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Free
About
Hey Why is a lightweight SQL EXPLAIN viewer for developers.
Run EXPLAIN on your MySQL database or paste EXPLAIN JSON to see why your query behaves the way it does.
• Explore execution plans by depth
• Instantly see full scans, filesort, and temporary tables
• Built for quick discussions without a laptop
• Local-only. No cloud. No tracking.
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What's New in Hey Why
1.0.0
February 18, 2026




