Visualizing brain functional connectivity (FC) patterns is essential for understanding neural organization, yet existing tools such as Circos and BrainNet Viewer require complex configuration files or proprietary software environments. We present BrainRing, a free, open-source, browser-based interactive tool for generating publication-quality chord diagrams of brain connectivity data. BrainRing requires no installation, backend server, or programming knowledge. Users simply open a single HTML file in any modern browser. The tool supports 8 widely-used brain atlases (Brainnetome 246, AAL-90/116, Schaefer 100/200/400, Power 264, and Dosenbach 160), provides real-time parameter adjustment through an intuitive graphical interface, and offers comprehensive edge management including click-to-connect, per-edge color customization, and Circos link file import. BrainRing supports both Chinese and English interfaces and enables researchers to produce publication-ready SVG and PNG figures with full control over visual styling, all within seconds rather than the minutes-to-hours workflow typical of script-based approaches. BrainRing is freely available at https://github.com/XiuFan719/brain-connectivity-viz with a live demo at https://XiuFan719.github.io/brain-connectivity-viz/.

翻译：可视化脑功能连接模式对于理解神经组织至关重要，然而现有工具如Circos和BrainNet Viewer需要复杂的配置文件或专有软件环境。我们提出BrainRing——一种免费开源、基于浏览器的交互式工具，可生成脑连接数据的高质量弦图。BrainRing无需安装、后端服务器或编程知识，用户只需在任意现代浏览器中打开单个HTML文件即可使用。该工具支持8种广泛使用的脑图谱（Brainnetome 246、AAL-90/116、Schaefer 100/200/400、Power 264和Dosenbach 160），通过直观的图形界面提供实时参数调节，并包含全面的边管理功能，包括点击连接、单边颜色定制以及Circos链路文件导入。BrainRing支持中英文界面，使研究人员能够完全掌控视觉风格，在数秒内生成可用于发表的SVG和PNG图像，而传统基于脚本的方法通常需要数分钟至数小时的工作流程。BrainRing可通过https://github.com/XiuFan719/brain-connectivity-viz 免费获取，在线演示地址为https://XiuFan719.github.io/brain-connectivity-viz/。