[jrandm]

> If I want to find anomalies among them, what would be the way to go?

What is an anomalous JSON file other than a JSON file that does not meet the specification[0]?

I have never gotten a "strange error" from a JSON parser. Most JSON parsers are very specific about whatever character they dislike. I would suggest that the algorithm you're seeking is in fact whatever is giving you the error.

If you're speaking to an API returning JSON, then you should be able to determine what the API is supposed to return to you. Many times different responses contain meaning about why the response is different than expected, like HTTP status codes.

Deep learning is a tool to use to solve a problem. Until you have a well defined problem it will be difficult to apply various machine learning techniques to it.

[0]: https://www.json.org/json-en.html