SQL Query Runner
FreeRun SQL queries against an in-browser SQLite database
About SQL Query Runner
Want to test a query without connecting to a real database or risking a single byte of production data? Spinning up a local database, loading a dump, and configuring credentials just to try out a JOIN or a GROUP BY is a lot of setup for a quick experiment. The SQL Query Runner gives you a real SQLite engine running entirely in your browser, so you can create tables, insert rows, and run SELECTs against them immediately.
Write your SQL, execute it, and see the result set right away. Because the database lives in the browser, nothing connects to any server and no data ever leaves your machine, which makes it safe for sketching out schema ideas or verifying query logic. It is free, needs no signup, and is instant, giving you a disposable sandbox for SQL whenever you need one.
Common uses
- Prototyping a schema and testing INSERT and SELECT statements without installing a database.
- Verifying that a tricky JOIN or aggregation returns the rows you expect.
- Teaching or learning SQL with a safe, throwaway database to experiment in.
- Reproducing a query bug in isolation using a small set of sample rows.
- Quickly checking the syntax and behavior of a query before running it on a real system.
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- Generate queries instantly
- Support for multiple DB engines
- Schema visualization
FAQ
Which SQL engine does this use?
It runs SQLite directly in your browser, so the supported syntax matches SQLite's dialect.
Does my data persist between sessions?
The in-browser database is meant for experimentation and is not a durable store. Treat each session as a fresh sandbox.
Can I connect to my own MySQL or Postgres database?
No. For safety and privacy the runner is fully self-contained in the browser and does not connect to external databases.
Is my query data private?
Yes. Everything executes locally in your browser, so no query or data is uploaded anywhere.
Can I use SQL Query Runner on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.