An SQLite extension is a dynamic link library (like a .dll on Windows, .dylib on macOS, or .so on Linux) that expands the core capabilities of the SQLite database engine. Because SQLite prioritizes being incredibly small and lightweight, it omits many functions natively found in larger databases like PostgreSQL. Extensions bridge this gap, allowing developers to plug in complex features only when they need them.
Depending on your context, “SQLite extension” can also refer to external developer tools, such as browser or VS Code add-ons. What SQLite Extensions Add
Run-time loadable extensions modify the database behavior or language syntax to provide: Run-Time Loadable Extensions – SQLite
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