You can toggle a setting in your Promotion & Feature Settings to "Do not allow other users to see the contents of my outfit".
Instead of searching for potentially unsafe tools, you can discover new styles through official and safe methods: imvu e hidden outfit viewer exclusive
You can hide or unhide items in your own inventory to keep your personal collection organized and private from others in the chat. The Risks of Third-Party "Exclusive" Viewers You can toggle a setting in your Promotion
Explore the IMVU Feed to see outfits that users have voluntarily tagged. Many sites claiming to be "exclusive" or "private"
Many sites claiming to be "exclusive" or "private" viewers may require you to log in with your IMVU credentials, which can lead to account hacking.
An outfit viewer typically refers to a third-party tool or website designed to reveal the individual products an avatar is wearing, even if the user has set their outfit to "private".