SQL Labs
100% Private • Serverless • Offline

Master SQLWithout The Server

A clean, privacy-focused SQL playground. No login. No tracking. Just code.

Start PracticeOpen Playground
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Practice Mode

Level up your SQL skills with curated questions in a LeetCode-style format. Perfect for interview prep or sharpening your query skills.

  • Difficulty levels — Easy, Medium, and Hard questions to match your skill
  • Topic tags — Filter by JOINs, Subqueries, Aggregations, and more
  • Instant feedback — Run your query and see pass/fail against test cases
Question #1Easy

Write a SQL query to find all employees who earn more than their managers...

JOINSubquery
your_table
SELECT COUNT(*) FROM users;
-- 100,000 rows

Playground Mode

Your own SQLite database right in the browser. Load your data, write queries, and get results — no setup required.

  • WASM-powered — SQLite runs entirely in your browser, zero server latency
  • Handle large datasets — Work with 100k+ rows without network overhead or account creation
  • Import CSVs — Upload your own data and start querying in seconds
  • Persistent storage — Your data stays in your browser, never leaves your device

100% Private

No backend means your queries and data never leave your device. Complete anonymity guaranteed.

Lightning Fast

Runs locally in your browser. Zero network latency, instant query results even on large datasets.

No Sign-up

Just open the page and start coding. No account needed, no friction, no tracking.