Loading Pydantic models from JSON without running out of memory by Itamar Turner-Trauring Last updated 22 May 2025, originally created 22 May 2025 You have a large JSON file, and you want to load the data into Pydantic. Unfortunately, this uses a lot of memory, to the point where large JSON files are very difficult to read. What to do? Assuming you’re stuck with JSON, in this article we’ll cover:

