OONI is a project aimed at mapping network anomalies by performing measurements from the vantage point of a users. You may find details on what exactly it is that we measure by reading through our test specifications. The data we collect is then made available to the public for further analysis.

The goal of this study is to have a better understanding on how the internet works around the world and what is stopping it from working as it should.

Please take a minute to go through what can be the possible implications for running OONI Probe and make sure you properly understand them before proceeding.


Before running OONI inside of a country with controversial internet access related laws you should consult a lawyer. You may also reach out to us with specific inquiries at legal@ooni.nu.

Some network tests that OONI does may be against the terms of service of your ISP or legally questionable by your country.

OONI’s http test will download data from controversial websites, specifically targeting those which may be censored in your country. These may include, for example, sites containing pornography or hate speech. You can find a list of sites checked at https://github.com/citizenlab/test-lists

Even where these sites are not blocked, it may be illegal to access them. It may also be illegal to bypass censorship, as OONI attempts by using Tor.

In the most extreme case, any form of active network measurement could be illegal or banned, or even considered a form of espionage.

Some useful resources may be:


OONI IS NOT DESIGNED TO PROTECT YOUR PRIVACY. It will reveal information about your internet connection to the whole world. Particular groups, such as your ISP and web services used by the ooni tests, will be able to discover even more detailed information about you.

THE PUBLIC will be able to see the information collected by OONI Probe. This will definitely include your approximate location, the network (ASN) you are connecting from, and when you ran OONI Probe. Other identifying information, such as your IP address, is not deliberately collected, but may be included in HTTP headers or other metadata. The full page content downloaded by OONI could potentially include further information, for example if a website includes tracking codes or custom content based on your network location.

You can see what information OONI releases to the public at https://ooni.org/data/. You should expect this information to remain online PERMANENTLY.

THE OONI PROJECT when running some tests against our backends will be able to see your IP address.

ORGANIZATIONS MONITORING YOUR INTERNET CONNECTION will be able to see all web traffic generated by OONI, including your IP address, and will likely be able to link it to you personally. These organizations might include your government, your ISP, and your employer.

ANYBODY WITH ACCESS TO YOUR COMPUTER, now or in the future, may be able to detect that you have installed or run ooni.

SERVICES CONNECTED TO BY OONI will be able to see your IP address, and may be able to detect that you are using OONI.