He called internet users - about 40 percent of people on earth (!) - to stand up for their right to a "free, open and truly global Internet."
The first woud be an Internet Users Bill of Rights for every country, proposing it to governments. Users can join the "WebWeWant" movement and help draft the proposed bill.
Berners-Lee has been campaigning or fewer controls on the web, and has praised former US intelligence contractor Edward Snowden after he revealed details of how the US government collects masses of online data.
"So I want to use the 25th anniversary for us all to do that, to take the web back into our own hands and define the web we want for the next 25 years," he said.