> Q: Can the yaml checker handle very large files?
  > A: Yes. The yaml checker uses efficient parsing algorithms and memory management to process large YAML files.

I pasted a 40MB yaml, and Firefox started to complain about a minute later that it is slowing down the browser. I waited another minute, but it was still thinking.

(Admittedly I'm not on a high-end machine, but it's not low-end either: Ryzen 5600G + 32GB RAM)