One of the stars of the YouTube family vlog channel Bratayley who later signed with Disney's Maker Studios. She plays the character Harmony on the web series Chicken Girls and has also appeared in the web series Mani. In 2018, she began starring on the Brat web series Hotel Du Loone.
The Bratayley channel was initially created for her. Bratayley is a combination of Brat and Hayley.
She appeared with her brother Caleb and sister Jules on another channel called OMMyGoshTV. She has over 3.8 million followers on her hayley.leblanc Instagram account. She launched a YouTube channel called Jam JR in 2018. In 2020, she became a member of the Run The World girl group.
She is close friends with singer and fellow Chicken Girls star Carson Lueders.