SQLite Query Explainer

This article introduces a web-based tool called SQLite Query Explainer, which allows users to run SQL queries against a SQLite database directly in their browser. The tool not only executes queries but also provides detailed, plain-English explanations of both the `EXPLAIN QUERY PLAN` and low-level `EXPLAIN` bytecode output. Built using Python, Pyodide, and WebAssembly, it annotates each line of the query plan and virtual machine instructions, making it easier for developers to understand how SQLite processes queries. The author acknowledges their own limited expertise in SQLite internals but finds the tool useful for learning.