SQL Playground
Write and run real SQLite queries in your browser. Load sample databases, import CSV or .db files, and inspect results in a sortable grid — no backend, fully private.
Loading SQLite engine…
By Vizo ToolLast updated August 20266 min read
SQL Playground — Run Real SQLite Queries in Your Browser
The SQL Playground runs a genuine SQLite engine inside your browser using WebAssembly (sql.js) — no backend, no sign-up, no database server. Create tables, insert data, run SELECT, JOIN, GROUP BY, subqueries, transactions, indexes, and views against real SQLite, and see the results in a polished, sortable data grid.
Load one of five ready-made sample databases (Employees, Products, Orders, Students, Customers), import your own CSV or SQL files, or upload an existing .db database. Run EXPLAIN QUERY PLAN to inspect how SQLite executes your queries, track execution time and row counts, and export results to CSV — all locally on your device.
- Real SQLite via WASM
- 5 sample databases
- CSV import & export
- Query history & explain
- 100% in your browser
Why Use SQL Playground?
Real SQLite, Not a Simulator
Powered by sql.js, a full WebAssembly build of SQLite — every query behaves exactly like your local database.
Five Sample Databases
Employees, Products, Orders, Students, and Customers — populated with realistic data so you can start learning instantly.
CSV & SQL Import/Export
Import CSV to create tables automatically, export any result set to CSV, and download or upload full .db files.
100% Private
The entire database lives in your browser's memory. Nothing is ever uploaded to any server.
Features
Monaco SQL Editor
Syntax highlighting, auto-completion for keywords, and multi-statement execution from one editor.
Full SQLite Support
CREATE, INSERT, UPDATE, DELETE, DROP, ALTER, SELECT with JOIN, GROUP BY, ORDER BY, LIMIT, indexes, views, and transactions.
Sample Databases
Five populated sample schemas to explore joins, aggregations, and subqueries immediately.
Beautiful Data Grid
Results render in a grid with pagination, column sorting, filtering, resizable columns, and copy cell/row actions.
CSV Import & Export
Create a table from any CSV file (with type inference) and export any query result back to CSV.
Query History
Recent queries and saved queries are stored locally, so you can re-run anything instantly.
EXPLAIN QUERY PLAN
See exactly how SQLite executes your query — the index scan, table scan, or join order used under the hood.
Database Files
Download your session as a real .db file and upload any existing SQLite database to keep working with it.
How to Use the SQL Playground
Start querying real SQLite in three simple steps.
Load a sample or write SQL
Pick a sample database like Employees or Products, type a query in the editor, or import a CSV/SQL/.db file.
Run the query
Press Run (or Ctrl/Cmd+Enter). Results appear in the data grid with execution time and row counts.
Explore & export
Sort and filter results, inspect the query plan with EXPLAIN, and export to CSV or download the database.
Frequently Asked Questions
Got questions? We've got answers.
What is the SQL Playground?▼
It's a browser-based tool that runs a real SQLite database engine (via WebAssembly) so you can create tables, insert data, and run queries without installing anything.
Is it free?▼
Yes, completely free with no sign-ups, no limits, and no data caps.
Is my data uploaded to a server?▼
No. The SQLite engine and your entire database run in your browser's memory. Nothing is ever uploaded.
Which SQL dialect does it support?▼
It uses real SQLite, so you get full SQLite SQL: joins, subqueries, window functions, CTEs, indexes, views, triggers, and transactions.
How does it run SQLite in a browser?▼
It uses sql.js, an official build of SQLite compiled to WebAssembly, which executes locally in your browser.
Can I run multiple statements at once?▼
Yes, the editor runs multiple semicolon-separated statements and shows the result of each one.
Are there sample databases?▼
Yes — five populated samples: Employees, Products, Orders, Students, and Customers, each designed to demonstrate joins and aggregations.
Can I import a CSV file?▼
Yes. Import a CSV and the tool creates a table automatically, inferring column types from the data.
Can I export query results to CSV?▼
Yes, any result set can be exported to a CSV file with one click.
Can I upload my own .db database?▼
Yes, upload any SQLite .db file and query it directly — the tool loads it into memory instantly.
Can I download my database?▼
Yes, download the current session (including all your changes) as a real SQLite .db file.
What does EXPLAIN QUERY PLAN do?▼
It shows how SQLite actually executes your query — which tables are scanned, which indexes are used, and the join order — invaluable for optimizing slow queries.
Does it track query history?▼
Yes. Recent queries and queries you explicitly save are stored locally and can be re-run with one click.
Can I sort and filter results?▼
Yes, the data grid supports click-to-sort columns, text filtering, pagination, and resizable columns.
Does it work on mobile?▼
Yes, the tool is fully responsive — the editor and data grid both work well on tablets and phones.
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