UK Regulator Slaps 4chan with Nearly $700,000 Fine Over Online Safety Act Breaches

The UK's online watchdog, Ofcom, has imposed significant penalties totaling almost $700,000 (£520,000) on the anonymous imageboard website 4chan for multiple failures to comply with the Online Safety Act 2023. These fines address critical shortcomings in user protection, particularly concerning children's safety.

Key Violations and Penalties

The combined penalties, amounting to £520,000 ($690,000), stem from 4chan's failure to adhere to the stringent requirements of the Online Safety Act 2023. Ofcom's investigation highlighted several areas where the platform fell short of its legal obligations.

The most substantial fine, £450,000 ($598,000), was levied due to 4chan's inability to implement an effective age verification system. This critical failure allowed children to potentially encounter pornographic content on the site. 4chan has been ordered to implement an age check system by April 2, with a daily penalty of £500 ($664) applying until compliance or June 1, whichever comes sooner.

An additional £50,000 ($66,400) fine was issued for the website's insufficient risk assessment regarding illegal content. The platform must conduct a comprehensive risk assessment by April 2, or face a daily penalty of £200 ($266).

Furthermore, 4chan received a £20,000 ($26,600) penalty for omitting specific provisions in its terms of service detailing how it protects users from illegal content. A daily fine of £100 ($133) will be imposed from its compliance deadline of April 2 until June 1 if this duty is not met.

Background and Previous Actions

Ofcom initiated its investigation into 4chan in June 2025, prompted by concerns that the platform, known for its anonymous and often unmoderated messaging boards, was not meeting its legal obligations under the Online Safety Act.

This latest round of fines follows a previous £20,000 ($26,700) penalty issued in October 2025. That fine was for 4chan's failure to provide Ofcom with a copy of its illegal harms risk assessment and information about its worldwide revenue. Ofcom has confirmed that this earlier fine, along with cumulative daily punishment fees for 60 days, remains unpaid by 4chan.

The Online Safety Act 2023 represents a landmark effort by the UK government to make online platforms more accountable for the content shared on their sites. These fines against 4chan underscore Ofcom's commitment to enforcing these regulations and protecting users, particularly children, from harmful content, setting a precedent for other online platforms.

Key Takeaways

  • 4chan has been fined a total of £520,000 ($690,000) by Ofcom for breaching the UK's Online Safety Act 2023.
  • The largest penalty, £450,000 ($598,000), is for failing to implement an age verification system to protect children from pornographic content.
  • Additional fines were levied for insufficient illegal content risk assessment and inadequate terms of service.
  • 4chan also has an outstanding £20,000 ($26,700) fine from October 2025, which remains unpaid, accumulating further daily penalties.