What used to take several minutes of typing and cross-referencing item IDs now takes seconds.

With Minecraft's 1.21.4+ snapshots, Mojang has introduced "Custom Model Data" and "Item States" to vanilla, which perform similar functions without needing Optifine. This makes Optifine-specific tools slightly less future-proof. Community Perspectives

This is a major win for beginners who struggle with the exact syntax required for NBT tags or regex patterns. Long Review: Performance and Utility

Web-based tools or standalone apps now exist to simplify this. Users simply select the item, type in the desired name, and the tool outputs the exact .properties file needed.

While they generate the file , you still have to manually place it in the correct deep-subfolder directory of your resource pack.