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DonateMeasure internet censorshipContribute to the world's largest open dataset on internet censorshipDownload OONI ProbeMobileAndroid & iOS

Mobile user guide →DesktopWindows & macOSDownload for Windows
Download for macOSDesktop user guide →Command lineLinux & macOSInstallation instructions →
CLI user guide →What OONI Probe measuresDiscover which websites are blockedRun OONI Probe to check which websites are blocked in your country.Learn how fast your network isMeasure the speed and performance of your network with the NDT test, developed
in collaboration with
M-Lab.Check which apps are blockedTest WhatsApp, Facebook Messenger, and Telegram to check if they are blocked. Run
OONI Probe to check if circumvention tools work on your network.Share evidence of internet censorship with the worldAs soon as you run OONI Probe, your test results will automatically get
published in near real-time. By running
OONI Probe, you help increase transparency of internet censorship.Explore OONI measurements from around the world >>FooterGlobal community measuring internet censorship around the
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The OONI Probe is a tool developed for measuring and sharing data related to internet censorship and network interference across the globe, functioning as part of the Open Observatory of Network Interference (OONI) initiative. The core purpose of the probe is to facilitate the measurement of internet censorship, thereby contributing to a world-wide open dataset concerning this topic.

The functionality of OONI Probe is multifaceted, allowing users to perform various tests related to network monitoring and censorship assessment. Users can utilize the probe to discover which specific websites are blocked within their jurisdiction. Furthermore, it can be used to assess network performance by executing the Network Detection Test (NDT), which was developed in collaboration with M-Lab, enabling users to measure the speed and overall performance of their network infrastructure. A key application involves checking the status of specific applications, such as WhatsApp, Facebook Messenger, and Telegram, to determine if these services are being blocked. The tool also allows users to test the efficacy of circumvention tools on their network.

A significant feature of OONI Probe is the automatic publication of test results in near real-time as soon as a test is executed. This mechanism is designed to enhance the transparency surrounding internet censorship by allowing users to share evidence of these measurements with the global community. The project emphasizes community involvement, enabling global participation in measuring internet censorship patterns.

The accessibility of OONI Probe is broad, offering access across various operating systems. It is available for mobile users on Android and iOS, and for desktop users on Windows, macOS, and Linux/macOS. Comprehensive documentation is provided, including mobile user guides, desktop user guides, and specific installation instructions, including a command line interface guide for Linux and macOS users. This structured documentation supports the deployment and understanding of the tool by a diverse technical audience.

Beyond the testing capabilities, the OONI platform supports a broader ecosystem through sections for Data, Community, Reports, and a Blog, alongside options for donations and accessing source code and API updates. This infrastructure supports continuous development and the open sharing of information related to network interference. The content associated with OONI is available under a Creative Commons license, underscoring the commitment to open data sharing.