The best way to experience Datasette for the first time is with a demo:
Glitch is a free online tool for building web apps directly from your web browser. You can use Glitch to try out Datasette without needing to install any software on your own computer.
Here's a demo project on Glitch which you can use as the basis for your own experiments:
Glitch allows you to "remix" any project to create your own copy and start editing it in your browser. You can remix the datasette-csvs project by clicking this button:
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