The most reliable way to find an ID for a public avatar is through the VRChat website .
There are community-created worlds specifically designed to read debug information. These are safe because they are native VRChat worlds, not external software. how to get avatar id vrchat
Notes:
Used for:
You can also view IDs for all your uploaded content without opening a specific scene: The most reliable way to find an ID
The Avatar ID is located at the end of the in your browser's address bar. Finding a Public Avatar's ID how to get avatar id vrchat