Side Copilot
Browser side-panel AI agent plus vertical tab manager: chat with open tabs, automate the browser, and organise tabs into synced Spaces
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sidespace.appAbout Side Copilot
Side Copilot is a browser extension that puts an AI agent and a vertical tab manager in the same side panel, so research and tab hygiene happen without leaving the page you are on. Chat Mode is aware of your open tabs: you can ask about them collectively, summarise the current page, select a region as context, or extract content, rather than copying text into a separate chat window. Agent Mode goes further and takes actions in the browser to automate multi-step web work. The organisational half is Spaces — tabs grouped into named contexts such as work, study, shopping or hobbies, all inside one window, so you focus on one space at a time instead of drowning in a single tab strip. Spaces sync across browsers and devices for logged-in users, covering Chrome, Edge, Brave, Vivaldi, Firefox, Zen, Sigma and Comet. Supporting features are the practical ones: pinned tabs per space, fuzzy search across tabs and spaces, tab suspension to reclaim memory, automatic de-duplication, save and restore of tab groups, theming, dark mode and five UI languages. A set of free standalone tools (chat with PDF, summariser, mind-map generator, YouTube summariser, AI detector, humaniser) runs on the web without the extension.
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