Retrieving and displaying save file information

Games with multiple save slots typically display certain stats in that particular save slot, such as time played, character level, level/location, progress percentage, among other things.

Thing is, I'm not sure how to actually do that with the save system, if at all. Is it possible, and if so, how?

Instead of trying to parse the save data to try and find the relevant info, I'd recommend separately saving the stats you want shown to the player in web storage (or online if you've got that set up). Make sure to somehow associate the save data with the stats in web storage, so the save files can be selected, and retrieved at a later date.

When the player is selecting a save file, display the stats in web storage to discerne between the save files.

Just save the data as dictionary keys and the dictionary as a webstorage key and retrieve it whenever.