If you have two JSON files before comparison, check this React Component, it uses json-diff-kit for diff methods and it works pretty well especially for deep array comparison. There are no similar package that has minimap, virtual scroll or search ability for json diff

No other library provided me correct outputs for my specific JSON objects including several indented arrays.

virtual-react-json-diff -> (https://www.npmjs.com/package/virtual-react-json-diff)

I am still developing for new features, this is open source and I am open for any contribution. I will apply new themes soon.