Is this a real database?

Yes — it runs SQLite (via sql.js, the SQLite engine compiled to WebAssembly) entirely in your browser. You get a genuine, fully functional in-memory SQL database: CREATE TABLE, INSERT, UPDATE, DELETE, SELECT, JOIN, GROUP BY, subqueries, CTEs, window functions, and more all work.

Is my data or my queries uploaded anywhere?

No. The database lives in your browser's memory and your queries run there. Nothing is sent to our server. After the one-time engine download (~1.5 MB), running queries makes no network requests at all.

Does my data persist between runs?

Each Run starts with a fresh in-memory database, so you should create your tables and insert data in the same script you query. This keeps results predictable and is the standard way to write a self-contained SQL exercise. (Persistent databases may be added later.)

Which SQL dialect is this?

It's SQLite syntax. SQLite is one of the most widely deployed databases in the world and its dialect is close to standard SQL, so it's an excellent way to learn core SQL that transfers to MySQL, PostgreSQL, and SQL Server. A few vendor-specific features differ, but SELECT/JOIN/aggregate fundamentals are the same.

How are results shown?

Each SELECT prints its result set as a simple text table (columns, a separator, then rows) in the output panel. Statements that don't return rows (CREATE, INSERT) run silently; if a whole script returns nothing, you'll see a 'Query OK' note.

Is this good for learning SQL or for students?

Very — it's a zero-setup SQL sandbox that works on any device including a phone. No database server to install, no account, no configuration. Write a schema, insert sample rows, and practise queries instantly. Ideal for students, interview prep, and quickly testing a query idea.

Developer · Runs in your browser

Online SQL Editor — run SQLite in your browser

Practise SQL with a real SQLite database that runs entirely in your browser — free, no signup, nothing uploaded. Create tables, insert data, and run queries instantly.

By Induwara Ashinsana— Executive Director, Ryzera TechnologiesUpdated May 28, 2026

SQL (SQLite) · runs in your browser

Loading editor…

Output

Press Run to execute. Output appears here.

How it works

This editor runs SQLite compiled to WebAssembly(sql.js) inside your browser. When you press Run, a fresh in-memory SQLite database is created on your device, your statements execute against it, and each query's rows are printed as a text table. No server, no upload — it's a complete database living in your tab.

Because it's the real SQLite engine, the SQL behaves exactly as it would in a production SQLite database: joins, aggregates, GROUP BY, CASE, subqueries, CTEs (WITH), and window functions all work. Since each run starts clean, write your CREATE and INSERT statements alongside your query.

Everything is isolated in your browser, bounded by a time limit, so it can never touch our systems or other users. The engine downloads once (~1.5 MB) and is cached for instant subsequent runs.

Frequently asked questions

Sources & references

Execution is the real SQLite engine via sql.js WebAssembly, running entirely in your browser.

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Found a bug or want another language added?

Email me at [email protected].