By Michael Nocito, data analyst · Published August 8, 2026
By the end of this page you will be running real SQL against a real database with nothing installed, and you will know which of the free browser tools suits which job. You will also know the thing none of them puts on the front page: some of them run entirely inside your browser, and some upload whatever you paste to a stranger's server. That difference decides what you are allowed to practise on.
Here is what to actually do today. If you want a database already loaded and questions already written, open sql-practice.com. If you want to create your own tables and share the result with someone, open DB Fiddle. Both start working immediately with no account.
The short version: browser-only tools keep your data on your machine, server-backed tools do not, and neither kind is the right place for anything from work.
Where the data goes is the one idea that should drive your choice, so it gets the picture.
