sqlite-page-explorer (via) Outstanding tool by Luke Rissacher for understanding the SQLite file format. Download the application (built using redbean and Cosmopolitan, so the same binary runs on Windows, Mac and Linux) and point it at a SQLite database to get a local web application with an interface for exploring how the file is structured.
Here's it running against the datasette.io/content database that runs the official Datasette website:
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