If you wish to remove individual works from a collection, you can do so from the collection's details page or your Dashboard on the desktop or mobile versions of pixiv.

In the app, you can remove all of your works from collections at once by going to the "Include works in collections" and selecting "Remove your works from all collections" in your Settings.

• In the iOS app
  My Page > Settings > Include works in collections
• In the Android app
  Settings > Include works in collections

Read the confirmation text carefully, check the box for "I have read and understood the above".

If no works are currently featured in collections, this option will not be displayed.

This action cannot be undone.