Ofcom has called on social media firms to modify their algorithms to prevent harmful content appearing on children’s feeds.
A 40-point framework published by the regulator also demands robust age verification methods to prevent children from accessing inappropriate content.
"We want children to enjoy life online. But for too long, their experiences have been blighted by seriously harmful content which they can’t avoid or control,” said Ofcom chief executive Melanie Dawes.
“Many parents share feelings of frustration and worry about how to keep their children safe. That must change,” she added.
The regulatory push aligns with the principles set out in the Online Safety Act.
Under the Online Safety Act, social media apps, search and other online services must prevent children from encountering the most harmful content relating to suicide, self-harm, eating disorders and pornography.
"When we passed the Online Safety Act last year we went further than almost any other country in our bid to make the UK the safest place to be a child online, noted Technology Secretary Michelle Donelan.
“That task is a complex journey but one we are committed to, and our groundbreaking laws will hold tech companies to account in a way they have never before experienced.”
The affected companies include all major social media platforms, search engines, and other online services that children are likely to use.
Ofcom said all tech firms should have a named person accountable for compliance with the children’s safety duties.