Serialized data is unreadable

Serialized data (PHP or JSON) could be presented in a structured format (there may be JavaScript libraries that will create a navigable structure of serialized data... But a quick Google search came up with little.)

I would say for serialized meta data values, present a link instead that shows the serialization format, i.e.

"JSON-Serialized Data"

or

"PHP-Serialized Data"

Which could show a popup for navigating the serialized data.

No files or tests are named. Start by locating where post-meta values are rendered, then determine how PHP- and JSON-serialized values can be detected and displayed. Done means serialized values have clear links and a navigable structured view or popup, but the issue leaves the library choice and implementation scope unresolved.

Written by the indexing model from the issue text.