Social media algorithms expose children to violent pornography and self-harm content
Social media platform algorithms expose children to violent pornography and self-harm content at scale, according to the UK Children's Commissioner. Research found 70% of young people have seen online pornography, mostly accidentally through algorithmic recommendations, with children reporting exposure to illegal violent content and harmful messaging about consent.
What happened
The Children's Commissioner for England reported that the proportion of children who have seen pornography online rose to 70% by 2025, up from 64% in 2023. A majority (59%) said they had seen pornography online by accident, a rise from 38% in 2023, with X (formerly Twitter) being the most common source at 45%, compared with 35% on dedicated pornography sites.
The report found children were exposed to violent and extreme content including depictions of strangulation (58% of respondents) and rape (44%), with some children as young as six or younger reporting exposure. TikTok and Instagram have been reported to recommend suicide and self-harm content 'at industrial scale' to young people.
Reported impact
The Children's Commissioner described the content as 'violent, extreme and degrading' and often illegal, stating that harmful content is being presented to children through dangerous algorithms rather than them seeking it out. Research suggested young people who had watched pornography were more likely to hold harmful beliefs about consent, with four in 10 respondents believing girls can be 'persuaded' to have sex even if they say no.
Index analysis
The problem stems from platform design, algorithms and recommendation systems that put harmful content in front of children who never sought it out. The gap between pornography seen on X and dedicated pornography sites widened between 2023 and 2025, suggesting algorithm changes may have increased exposure on the social media platform.
Classification
Sources and evidence
This record was researched and written by the Index, based on the following original reporting.