onlinecompass.me

What It Is

OnlineCompass.me is a free online compass that runs directly in modern browsers. Using a device’s magnetometer, motion/orientation sensors, and location capabilities, it displays information such as current direction, magnetic north, bearing/azimuth, latitude and longitude, altitude, and speed. The site emphasizes that all sensor and location data is processed locally on the device and is not stored on its servers.

Core Features and Technology

Functionally, it covers the traditional compass directions N, S, E, and W, as well as NE, NW, SE, and SW, and provides heading/bearing in degrees. Its GPS section can show latitude, longitude, altitude, accuracy, and movement speed. According to its technical information, the service is built with HTML5, CSS3, and JavaScript, using the DeviceOrientation API, Geolocation API, magnetometer access, PWA capabilities, and service workers, with Tailwind CSS. The ability to work offline after loading is a notable advantage over typical web-based tools.

Pricing and Openness

The main content clearly describes it as a free online compass application, with no visible information about subscriptions, ads, enterprise plans, or payment methods. On the open-source side, there is no public repository or license information. Its terms of service state that the content, features, and intellectual property belong to OnlineCompass.me and its licensors, so it cannot be considered open source. It also does not provide an API, SDK, embeddable component, or self-hosting option.

Pros and Cons

Its advantages are that it requires no installation and works across iOS, Android, Windows, macOS, and other devices as long as the browser supports the required sensors. Its privacy design is also relatively clear, making it suitable for users who are sensitive about location data. The downside is that it depends heavily on browser permissions and hardware sensors; if location, motion, or compass permissions are denied, its functionality will be significantly limited. Accuracy can also be affected by metal objects, magnetic fields, device calibration, and indoor or outdoor conditions. The terms also explicitly note that it should only be used as a supplementary navigation tool.

Who It’s For and Access from China

It is best suited to lightweight scenarios such as hiking, travel, education, everyday direction-finding, and assistance with religious orientation. For developers, it can serve as a reference for web-based sensor applications, but it is not a full developer tool platform. The main content does not provide information about access from mainland China, and there is no payment information. Alternatives include the built-in compass apps on smartphones, map applications, other online compass websites, and physical compasses.