Is my data safe in SQL Playground?

Yes! SQL Playground runs entirely in your browser. Your data never leaves your device — there is no server-side processing. Everything stays private and local.

What SQL syntax does SQL Playground support?

SQL Playground uses SQLite, which supports standard SQL including SELECT, INSERT, UPDATE, DELETE, CREATE TABLE, JOIN, GROUP BY, HAVING, ORDER BY, subqueries, CTEs (WITH clauses), window functions, and more.

Can I upload multiple CSV files?

Yes! You can upload or paste multiple CSV files, each becoming a separate table in your database. This lets you practice JOINs and multi-table queries.

Do I need to install anything?

No installation needed. SQL Playground runs entirely in your web browser using WebAssembly-powered SQLite. Just open the page and start querying.

Yes. Your query history is automatically saved in your browser's local storage. You can also export your entire database as a file and re-import it later, and export query results as CSV files.

Free Online SQL Playground (No Signup) - Practice SQL in Your Browser

Import Data

Drop a CSV file here, or click to browse

Table name: Delimiter: First row is header

Results

Run a query to see results here.

SQL Playground is a browser-based SQL environment. Paste or upload CSV data, and it gets loaded into an in-browser SQLite database powered by WebAssembly. Write and run SQL queries, view results in sortable tables, and export your work. Everything runs locally in your browser — your data never leaves your device. Perfect for SQL practice, quick data analysis, or when you don't have access to a database tool.

How to Use This Tool

Load data — Click "Sample Data" to load example tables, or import your own CSV files

Browse your schema — Use the Schema Browser in the sidebar to see tables, columns, and row counts

Write SQL queries — Type SQL in the editor (supports SELECT, INSERT, UPDATE, DELETE, CREATE TABLE, and more)

Run and review — Click "Run" or press Ctrl+Enter to execute; results appear in a sortable table below

Export results — Download query results as CSV or export the entire database as a .sqlite file

Common Use Cases

How do I practice SQL without installing a database? This browser-based SQLite playground lets you write and run real SQL queries instantly with no setup or signup

How do I query a CSV file with SQL? Upload or paste CSV data and it becomes a SQL table you can query, join, filter, and aggregate

How do I test a SQL query before running it on production? Load sample data or your own dataset and safely experiment with queries in an isolated in-browser database