It can handle relatively large JSONs.

Ctrl/Meta + click expands or collapses the whole branch.

Hover node name and click 📋 to copy subtree contents.

Hover strings with escaped symbols (\" \\ \b \f \n \r \t \uhhhh) to see a tooltip with contents in human readable form.

Filtering:

• enter regex to filter items
• press "Expand filtered items" button or Enter while editing to expand filtered items and exit filtering mode