Run SQLite 3 online — real DB engine, in-memory, browser-hosted.
SQLite is the most-deployed database on Earth (every phone, every browser, every plane). Zero-config, single-file, transactional, and — critically — a very strict SQL implementation.
ls-judge runs SQLite 3 inside a Firecracker microVM. Write CREATE + INSERT + SELECT in a single script, or feed a schema via stdin.
Clicking "Run now" opens the playground with this exact code and a matching test case pre-loaded — passes on first Run.
.mode list
SELECT 'Hello, World!';
(empty)Hello, World!