View Mozilla Bugzilla bug reports and run SQL queries against a SQLite database to see exactly how SQLite executes them. The tool annotates every line of `EXPLAIN QUERY PLAN` and low-level `EXPLAIN` bytecode output with plain-English descriptions of what the query planner and virtual machine are doing. Load the built-in example database with 170,000+ rows across multiple tables with indexes and a view, or open your own SQLite file, then write queries with clickable bytecode instruction links and hoverable register highlighting. Powered by Python's `sqlite3` module running in Pyodide, so all data stays in your browser.

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