The Internet Watch Foundation said Facebook, Google, Microsoft, Twitter and Yahoo had agreed to adopt a system to identify and block images of child sex abuse.
The British-based group said in a statement that the system is based on a digital fingerprint, or "hash," which its analysts assign to inappropriate images.
This enables websites participating in the project to filter and block the content.
The "hashes" will be created from images that have been analysed and classified as abusive by analysts from the foundation.
The new system "could be a game-changer and really steps up the fight against child sexual abuse images online," said Susie Hargreaves, chief executive of the IWF.
"It means victims' images can be identified and removed more quickly, and we can prevent known child sexual abuse images from being uploaded to the Internet in the first place."
Get your daily dose of tech news, reviews, and insights, in under 80 characters on Gadgets 360 Turbo. Connect with fellow tech lovers on our Forum. Follow us on X, Facebook, WhatsApp, Threads and Google News for instant updates. Catch all the action on our YouTube channel.
Samsung Galaxy Watch 9 (44mm, LTE)
Starts from ₹44,999
Samsung Galaxy Watch 9 (40mm, LTE)
Starts from ₹37,999
Samsung Galaxy Watch 9 (40mm)
Starts from ₹37,999
Haier M70 Mini LED 65-inch
Starts from ₹74,990
CMF Buds Neo True Wireless Stereo (TWS) Earphones
Starts from ₹2,199
Xiaomi TV FX Mini LED 65
Starts from ₹64,999
IFA 2026: Lenovo Unveiled New IdeaPad, Yoga and ThinkBook Laptops
IFA 2026: Nvidia RTX Spark PCs, Local AI Tools Announced With October Launch Planned
Luna Band Now Available Globally: Check Price in India, Specifications and Features