Web Dev//SQL//SQLite

Embedded SQL database engine. No separate server needed -- the database is a single file on disk.

Embedded SQL database engine. No separate server needed -- the database is a single file on disk.

Links directly into the app (it's a C library, not a separate process)

Zero configuration: no username, no password, no port, no running process. Just a .sqlite file.

Ideal for: mobile apps (Android/iOS use it by default), desktop apps, prototypes, low-to-medium volumes

Main limitation: single writer at a time (no concurrent writes)

D1 is SQLite running at the edge -- Cloudflare uses it as the engine for its simplicity and lightness