She is best known for playing Katy Fox in the Channel 4 soap opera Hollyoaks and Tara Brown in sitcom The Inbetweeners.
[3] Tointon's first appearance on television was in the CBBC hit sitcom Kerching!, where she played Tamsin, the love interest of the main character Taj Lewis.
In 2006, she appeared in the television series Murder City, where she played Bethany Williams in the episode "Just Seventeen".
Outside of Hollyoaks, she is close friends with Jamie Lomas (Warren Fox), Chris Fountain (Justin Burton), Roxanne McKee (Louise Summers) and Kent Riley (Zak Ramsey).
[5] It was announced on 3 November 2007 that Tointon had quit Hollyoaks to try new things, and that she will have played the character of Katy Fox for a year.
[11][12] In July 2012, she played a character called Frog in an episode of the E4 series The Midnight Beast, where she was Dru's girlfriend.
[16] In June 2022, she appeared as Rachel Saunders in the science fiction horror TV adaptation of The Midwich Cuckoos by John Wyndham.