Python FastAPI Tutorial (Part 7): Sync vs Async - Converting Your App to Asynchronous

Published: 17 January 2026
on channel: Corey Schafer
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In this video, we'll be learning about synchronous versus asynchronous in FastAPI. We'll cover when you should use async routes, when you should stick with synchronous routes, and then we'll convert our entire application from sync to async. This includes updating our database configuration to use async SQLAlchemy with aiosqlite, converting all of our routes to use async/await, handling eager loading for relationships, and updating our exception handlers. By the end of this tutorial, you'll understand when async actually provides benefits and how to implement it correctly in your own FastAPI projects. Let's get started...

The code from this video can be found here:
https://github.com/CoreyMSchafer/Fast...

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