A cross-party group of politicians have teamed up to launch a campaign to "take a stand" against online abuse.
Labour's Yvette Cooper has announced the project called Reclaim The Internet.
She was joined at Westminster launch by Labour MP Jess Phillips, former Lib Dem MP Jo Swinson and ex-Tory minister Maria Miller.
The politicians say they want to make sure that no-one can threaten women on the internet or bombard them with sexist insults.
They have launched a website and will discuss issues at a conference in July.
The campaign has been backed by Girlguiding, who says there is a "clear and urgent need for action".
The think tank Demos released a study to coincide with the launch of the campaign, in which researchers found that half of all online abusers were actually women.
It also found that 200,000 tweets featuring the words "slut" and "whore" were sent during a three week period in April.
Some high-profile of victims of online trolling include rapper Azealia Banks, columnist Katie Hopkins and female presidential candidate Hilary Clinton.