noun which may take the genitive case particle 'no'
royalty-free
Describes content (images, music, etc.) that can be used without paying royalties, though other license terms may still apply. Often used attributively with の.
See also: ロイヤリティーフリー
このサイトでは著作権フリーの画像をダウンロードできます。
You can download royalty-free images on this site.
動画編集に著作権フリーの音楽を使った。
I used royalty-free music for the video editing.