InvShots

Save interactive snapshots of your inventory and ender chest, then revisit them anytime with full item tooltips and enchantment details — perfect for keeping track of your best gear, or reviewing what you had before a dangerous adventure. For servers each player’s snapshots are private by default; operators can view and manage everyone’s.
Commands:

• /invshots save [name] — Save a snapshot of your inventory and ender chest
• /invshots list — List your saved snapshots
• /invshots view [echest] — View a snapshot interactively
• /invshots delete — Delete a snapshot

Operator only:

• /invshots list — List another player’s snapshots
• /invshots view [echest] — View a player’s snapshot
• /invshots delete — Delete a player’s snapshot

Single player: Works out of the box — commands have no permission requirement, so you can use them directly.

Server: Install the mod on the server only. Clients don’t need anything — the inventory UI displays through vanilla container screens. Each player’s snapshots are stored in config/invshots//.