R;pple exists to give people a voice, choice, empowerment and control at a time when they are most vulnerable. The Ripple Tool is a browser extension that provides immediate mental health signposting to anyone who searches for content related to self-harm or suicide online. When a harmful keyword or phrase is detected, the tool overlays a message of hope directly on the page — connecting people in crisis with trusted mental health resources, local support services, and 24/7 helplines, without requiring them to navigate elsewhere. Where the Ripple Tool works: The extension monitors for harmful search terms across major search engines and AI chat platforms, including: Search engines: Google, Bing, Yahoo, DDG and Ecosia. AI chat platforms: ChatGPT, Google Gemini, and Claude Who is it for? The Ripple Tool can be installed by individuals who want an additional layer of support, or deployed organisation-wide by employers (subject to licensing), schools, or healthcare providers to provide passive, always-on mental health protection for their people. What happens when harmful content is detected? A non-intrusive pop-up appears on the page, offering the user a choice of accredited mental health resources tailored to their location. These include 24/7 support services available via phone, text, webchat, and mobile app — giving people help in the format that works best for them. Testing the extension: To see the tool in action, type "ripple test" into any supported search engine or AI chat platform.