Items or Blocks
You can use CreativeMode mods with CurseForge.
For the best experience with CreativeMode mods, consider the CreativeMode Launcher.
Follow installation instructions for CurseForge from curseforge.com/download/app.
Click Create Custom Profile. Set name (like "CreativeMode 1.21.5"), game version (1.21.5 or 1.20.1), modloader (Fabric), Fabric version (0.16.14 or latest).
Select your profile. Click Add More Content. Search "Fabric API". Install the version matching your Minecraft version.
Download mods from creativemode.net. Right-click your profile → Open Folder → open mods subfolder. Drag-and-drop the downloaded .jar files there.
Select your profile and click Play. Minecraft launches with your mods loaded!
See also: Java 1.21.5, FAQ.