Website Carbon is a free, public tool that estimates the carbon footprint of any web page, helping people see the often-invisible environmental cost of the websites they visit and build. Created by the team at Wholegrain Digital, a London-based agency dedicated to sustainable web practice, the tool turns a complex topic into something clear and approachable for everyone. With a simple interactive calculator and plain-language explanations, Website Carbon equips designers, developers, agencies, and organizations with practical insights to reduce the environmental impact of the web, one page at a time.

WordPress sits at the heart of this educational resource, powering both the calculator experience and the wider body of content that makes sustainable web design easier to understand and act on. The same flexible platform supports Wholegrain Digital’s broader mission too, including ambitious projects like the migration of more than 70,000 articles and 150,000 data points to WordPress for IFEX, the global network defending freedom of expression. From a focused public tool to enterprise-scale content migrations, these examples show how WordPress can scale gracefully to meet very different needs while keeping the user journey simple and purposeful. It’s a lovely reminder that a thoughtful, well-built website can inform, empower, and even help make the web a little greener.