How to Use SQL Playground
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1. Write SQL Queries
Type CREATE TABLE, INSERT, SELECT, JOIN, or any SQL statement in the editor.
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2. Execute
Click Run or press ⌘↵. Queries run against an in-memory SQLite database.
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3. Read Results
Each SELECT query renders an interactive result table below the editor.
The Technical Details
This interactive web utility provides fast, reliable, and completely private data transformations. In modern workflows, quick formatting, conversions, or estimations are essential. By running all logic entirely in your browser with client-side JavaScript, this tool guarantees that your data never leaves your machine. This approach delivers maximum performance and absolute data privacy, as no information is ever sent to a server.
Frequently Asked Questions
Which SQL dialect is supported?
SQLite: a lightweight, full-featured SQL engine running via WebAssembly in your browser.
Does it need an internet connection?
Only to load the SQLite WASM file on first visit. After that, all queries run locally offline.
Is the database persisted between sessions?
No. The in-memory database is reset on every page reload. Export your data before closing.
Can I run multiple statements?
Yes. Separate multiple SQL statements with semicolons and all will execute in order.