Last updated: 23 September 2026
Volt respects your privacy. Here is exactly what happens to data, in plain language.
To measure your speed, the test exchanges random measurement data: bytes with no meaning at all. No file or content of yours is ever transmitted.
The exchange takes place with the M-Lab (Measurement Lab) network, an open scientific measurement platform. M-Lab stores and publishes every measurement (speeds, latency, IP address, timestamp) as open research data: that is how the platform works, and it lets anyone verify the measurements. Their policy is available at measurementlab.net.
If no M-Lab server can be reached, the test does not start: Volt has no fallback server and never shows an estimated result. Volt does not keep any test result.
No sign-up is needed. We only measure anonymous traffic: page viewed, time spent, device type, language and country. No cookies and no third-party service are involved: your IP address is used only to work out the country, then turned into a daily, non-reversible fingerprint that changes every night. It is never stored. If your browser sends a Do Not Track or GPC signal, you are not counted at all. Your theme preference stays on your device.
If you write to us, we keep your name, email address, subject and message, solely to reply to you. Only the site operator can read them; they are never sold, shared or used for marketing. Only the 500 most recent messages are kept, and older ones are deleted automatically. To prevent abuse, the number of messages per connection is limited using a non-reversible fingerprint of the IP address.
Volt is free and funded by advertising, provided by Google AdSense. Google and its partners may use cookies to serve and measure ads and, if you consent, to personalise them. In the European Economic Area, the United Kingdom and Switzerland, personalised ads are shown only with your consent. To learn more: how Google uses information from sites that use its services. You can turn off personalisation at any time in your Google ad settings.
You can ask to access, correct or delete a message you sent us, using the contact form. You can also contact the data protection authority in your country. For data processed by Google, please refer to Google's own policies.
For any question, write to us through the About & contact page.