About SQL Playground — Run SQLite Online in Your Browser
Run real SQL in your browser. The SQL Playground boots a complete SQLite database compiled to WebAssembly, so you can create tables, insert rows, and run queries without installing a database or signing up for anything. It's the fastest way to test a query, prototype a schema, or work through a SQL exercise.
Because the whole engine runs client-side, every query executes instantly against an in-memory database that lives only in the current page. Write your DDL and your SELECT together, press Run, and see each result set rendered as a table you can copy.
Nothing is uploaded and there is no server round-trip: your schema, your data, and your queries never leave your device, which makes this a safe scratchpad even for sensitive or proprietary data.
Features
- A full SQLite engine (via sql.js / WebAssembly) running entirely in the browser
- Run schema and queries together — CREATE, INSERT, UPDATE and SELECT in one script
- Each SELECT renders as a sortable, copyable result table; multiple result sets supported
- Completely offline and private — no account, no server, no data ever uploaded
How to use
- Write your SQL — define tables, insert rows, and add the query you want to run.
- Press Run to execute the whole script against a fresh in-memory SQLite database.
- Read each result set in the output tables, and copy the results as needed.
Frequently asked questions
Which SQL dialect does the playground support?
It runs SQLite, via the official SQLite source compiled to WebAssembly (sql.js). Anything valid in SQLite — common table expressions, window functions, JSON functions, aggregates — works here.
Is my data saved between runs?
No. Each Run starts from a fresh in-memory database, so runs are isolated and reproducible. Include your CREATE and INSERT statements in the script so the data exists when your query runs.
Does anything get uploaded to a server?
No. The entire database engine runs in your browser through WebAssembly. Your SQL and data stay on your device, so the tool works offline and is safe for confidential data.
Why does the engine take a moment on the first query?
The WebAssembly SQLite engine (about 1 MB) downloads once the first time you press Run, then it is cached for the rest of your session and subsequent queries are instant.
Related tools
Everything runs locally in your browser — your input is never uploaded.