Durability Viewer Add-on 1.21+

Quickly assess the condition of your equipment at any time to avoid the moment when your Sword shatters into splinters with the next strike. Actively monitoring durability will help you avoid not only death but also resource expenditure. The Mod Durability Viewer displays the current durability of items in your inventory, making gameplay in Minecraft significantly more convenient.

The add-on can work as a texture pack; when the behavior pack is activated, it additionally displays the durability values of the Shield and Armor directly on the screen without any extra actions.

You can also see the durability in numbers by hovering over the item.