Arcmark – macOS bookmark manager that attaches to browser as sidebar
Hey HN! I was a long-time Arc browser user and loved how its sidebar organized tabs and bookmarks into workspaces. I wanted to switch to other browsers without losing that workflow. So I built Arcmark, it's a macOS bookmark manager (Swift/AppKit) that floats as a sidebar attached to any browser window. It uses macOS accessibility API to follow the browser window around. You get workspace-based links/bookmarks organization with nested folders, drag-and-drop reordering, and custom workspace colors. For the most part I tried replicating Arc's sidebar UX as close as possible. 1.…
Arcmark – macOS bookmark manager that attaches to browser as sidebar launched on February 14, 2026 with 94 votes, #393 of 16,628 launches that month and more than 95% of that year's launches.
In plain words
Arcmark is a macOS bookmark manager that replicates Arc browser's sidebar workflow for use with any browser. It floats as a sidebar attached to browser windows, organizing bookmarks into workspaces with nested folders, drag-and-drop reordering, and custom colors. Built with Swift and AppKit, it uses macOS accessibility APIs to follow the browser window. All data is stored locally in a single JSON file with no accounts or cloud sync required. Users can import existing pinned tabs and work with Chrome, Safari, Brave, Arc, or use it standalone.
written from the facts on this page · September 2026
From the sources
macOS bookmark manager that attaches to any browser window as a sidebar - Geek-1001/arcmark
Arcmark is a native macOS bookmark manager built with Swift and AppKit that attaches to any browser window as a sidebar. Inspired fully by how the tabs organization works in Arc browser's sidebar, so that the author could finally stop using this browser and try something else. Browser-Attached Sidebar - Float alongside any browser window (Chrome, Arc, Safari, Brave, etc.) for instant access to your bookmarks without switching apps. Workspace Organization - Organize bookmarks into multiple workspaces with custom window colors. Create nested folder hierarchies with drag-and-drop. Local-first - All bookmarks stored in a single JSON file ( ~/Library/Application Support/Arcmark/data.json ).…from github.com
In the maker’s words, at launch
Hey HN! I was a long-time Arc browser user and loved how its sidebar organized tabs and bookmarks into workspaces. I wanted to switch to other browsers without losing that workflow. So I built Arcmark, it's a macOS bookmark manager (Swift/AppKit) that floats as a sidebar attached to any browser window. It uses…
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