Femtanyl (stylized in all lowercase) are a Canadian digital hardcore band based in Toronto consisting of founding member and lead singer Noelle Stockwood and multi-instrumentalist Juno Callender, who later joined in 2025. As well as being classified as digital hardcore music, they have been labeled as breakcore. Their music is popular in online spaces, especially among the furry fandom. They take inspiration from a wide variety of sources including groups like Nine Inch Nails, Throbbing Gristle, The Prodigy, and Drain Gang, as well as modern electronic dance music and pop music.
Femtanyl was originally a solo act by Stockwood in 2023. Early tracks such as "Katamari" and "Girl Hell 1999" gained her enough popularity to sign a distribution deal with , part of the Artist Partner Group. She released her debut EP, Chaser, in September of the same year. Writing for Pitchfork, Kieran Press-Reynolds described the EP as "a relentless hamster wheel of energy." It amassed over 40 million streams in its first year on streaming services.
Stockwood performed her first show in January 2024, which sold out in two hours. On August 15, Stockwood was introduced to Callender by her manager to perform as a live drummer. By July 2024, they had sold out multiple shows with over 650 tickets each. Stockwood released her sophomore EP, Reactor, in November. It featured American rapper Danny Brown on the track "M3 n M1n3". In 2025, Callender was officially made a member of Femtanyl. Callender described her work as "electronic music with an emphasis on physicality, aggression and kinetics".
In November 2025, Femtanyl appeared on previous collaborator Danny Brown's album Stardust, featuring on the track "ILoveMyLife". The band, alongside American musician Underscores, were supporting acts for Brown's tour in support of the album. Femtanyl is slated to perform at the Primavera Sound 26 festival in Barcelona, Spain. They released their debut album Man Bites Dog on February 13, 2026.
Stockwood is a transgender woman. The cover art of Femtanyl's music often depicts a cat-like mascot named Token that frequently appears disfigured or injured.