Tim Berners-Lee

Berners-Lee was born in London on 8 June 1955, the son of the mathematicians and computer scientists Mary Lee Berners-Lee (née Woods; 1924–2017) and Conway Berners-Lee (1921–2019). His parents were both from Birmingham and worked on the Ferranti Mark 1, the first commercially built computer. He has three younger siblings; his brother, Mike, is a professor of ecology and climate change management.

Berners-Lee attended Sheen Mount Primary School, then Emanuel School (a direct grant grammar school at the time) from 1969 to 1973. A keen trainspotter as a child, he learnt about electronics from tinkering with a model railway.

In 1976, Berners-Lee took a first in physics from The Queen's College, Oxford. While there, he made a computer out of an old television set he had purchased from a repair shop.

After graduation, Berners-Lee worked as an engineer at the telecommunications company Plessey in Poole, Dorset. In 1978, he joined D. G. Nash in Ferndown, Dorset, where he helped create typesetting software for printers.

Berners-Lee worked as an independent contractor at CERN from June to December 1980. While in Geneva, he proposed a project based on the concept of hypertext, to facilitate sharing and updating information among researchers. To demonstrate it, he built a prototype system named ENQUIRE.

After leaving CERN in late 1980, he went to work at John Poole's Image Computer Systems, Ltd, in Bournemouth, Dorset. He ran the company's technical side for three years. The project he worked on was a "real-time remote procedure call" which gave him experience in computer networking. In 1984, he returned to CERN as a fellow.

In 1989, CERN was the largest Internet node in Europe and Berners-Lee saw an opportunity to join hypertext with the Internet:

I just had to take the hypertext idea and connect it to the TCP and DNS ideas and—ta-da!—the World Wide Web.

Creating the web was really an act of desperation, because the situation without it was very difficult when I was working at CERN later. Most of the technology involved in the web, like the hypertext, like the Internet, multifont text objects, had all been designed already. I just had to put them together. It was a step of generalising, going to a higher level of abstraction, thinking about all the documentation systems out there as being possibly part of a larger imaginary documentation system.

Berners-Lee wrote his proposal in March 1989 and redistributed it in 1990. It then was accepted by his manager, Mike Sendall, who called his proposals "vague, but exciting". Robert Cailliau had independently proposed a project to develop a hypertext system at CERN, and joined Berners-Lee as a partner in his efforts to get the web off the ground. They used similar ideas to those underlying the ENQUIRE system to create the World Wide Web, for which Berners-Lee designed and built the first web browser. His software also functioned as an editor (called WorldWideWeb, running on the NeXTSTEP operating system), and the first Web server, CERN httpd (Hypertext Transfer Protocol daemon).

Berners-Lee published the first website, which described the project itself, on 20 December 1990; it was available to the Internet from the CERN network. The site provided an explanation of what the World Wide Web was, and how people could use a browser and set up a web server and a website. On 6 August 1991, Berners-Lee first posted, on Usenet, a public invitation for collaboration with the WorldWideWeb project.

In a list of 80 cultural moments that shaped the world, chosen by a panel of 25 eminent scientists, academics, writers and world leaders in 2016, the invention of the World Wide Web was ranked number one, with the entry stating: "The fastest growing communications medium of all time, the Internet has changed the shape of modern life forever. We can connect with each other instantly, all over the world."

In 1994, Berners-Lee founded the W3C at the Massachusetts Institute of Technology. It comprised various companies willing to create standards and recommendations to improve the quality of the Web. Berners-Lee made his idea available freely, with no patent and no royalties due. The World Wide Web Consortium decided that its standards should be based on royalty-free technology, so that anyone could easily adopt them.

Berners-Lee participated in Curl Corp's attempt to develop and promote the Curl programming language.

In 2001, Berners-Lee became a patron of the East Dorset Heritage Trust, having previously lived in Colehill in Wimborne, East Dorset. In 2004, he accepted a chair in computer science at the School of Electronics and Computer Science, University of Southampton, Hampshire, to work on the Semantic Web.

In a Times article in October 2009, Berners-Lee admitted that the initial pair of slashes ("//") in a web address were "unnecessary". He told the newspaper that he easily could have designed web addresses without the slashes. "There you go, it seemed like a good idea at the time," he said in his lighthearted apology.

Since 2021, Berners-Lee has been an advisory board member of Proton Foundation.

Berners-Lee has said "I like to keep work and personal life separate."

Berners-Lee has married three times. Following final exams in Oxford, he married Jane Northcote (daughter of Cambridge biologist Don Northcote) in 1976. They moved together to Poole to work at Plessey, and then moved in 1980 to work at CERN together for a six-month contract. After their return to Britain, they decided to end their marriage.

In 1990, Berners-Lee married Nancy Carlson, an American computer programmer. She was also working in Switzerland at the World Health Organization. They had two children and divorced in 2011. In 2014, he married Rosemary Leith at the Chapel Royal, St. James's Palace in London. Leith is a Canadian Internet and banking entrepreneur and a founding director of Berners-Lee's World Wide Web Foundation. The couple also collaborate on venture capital to support artificial intelligence companies.

Berners-Lee was raised as an Anglican, but he turned away from religion in his youth. After he became a parent, he became a Unitarian Universalist (UU). When asked whether he believes in God, he said: "Not in the sense of most people. I'm atheist and Unitarian Universalist."

The web's source code was auctioned by Sotheby's in London during 23–30 June 2021, as a non-fungible token (NFT) by Berners-Lee. It sold for US$5,434,500. The proceeds would reportedly be used to fund initiatives by Berners-Lee and Leith.

In 2025, Berners-Lee published a memoir, This Is for Everyone, with ghostwriter Stephen Witt. Stephen Fry recorded the audiobook.

In November 2025, Berners-Lee was the guest on BBC Radio 4's Desert Island Discs. His choices included "Brothers in Arms" by Dire Straits, "End of the Line" by the Traveling Wilburys, and "Four Strong Winds" by Ian & Sylvia. His luxury item was a chromatic harmonica.