About DownSonar

What DownSonar is

DownSonar answers one question fast: is a website or app down for everyone, or is it just you? Every site has its own page, at downsonar.com/ followed by its address (for example downsonar.com/youtube.com), with the answer in the first line.

Each answer comes from two signals side by side: our own checks of the site, and problem reports from people who use it. Either one alone can be wrong. Together they rarely are.

How we check a site

Our servers open 2,706,692 websites in turn and note what comes back: the answer and how long it took, an error, or nothing at all. Popular sites are checked every few minutes, the rest less often.

When a site stops answering, we check again from a second server in another country. If both fail, the page says the outage is confirmed from two countries. That rules out a problem on our side or one network on the way.

Anyone can ask for a fresh check with the "Check now" button on a status page, once every five minutes per site.

How problem reports work

Not working for you? The "I have a problem" button on a site's page lets you say what is wrong: the website won't load, you can't log in, the app doesn't work, it is very slow, or part of it is broken. Your report shows up for everyone right away.

We count people, not clicks: one report per person per site every 30 minutes. We don't keep your IP address with a report, only a code that changes every day, your country and what you picked. The privacy policy has the details.

A handful of reports is normal for a big service at any time. What matters is how many people report compared with what is usual for that site, and whether many of them report at once.

What the answer on a page means

• No problems: our last check reached the site and nobody is reporting problems.
• A few reports: a couple of people reported a problem in the last 30 minutes. That can be a local problem.
• Very slow: the site answers, but takes far longer than it should.
• Possibly down: our last check could not reach the site, and we are waiting for the next check to be sure.
• Users report problems: the site answers our check, but far more people than usual say it doesn't work for them. Often only part of a service is broken, like logging in or one app.
• Down: our own check cannot reach the site either.

Some sites block automated checks or visitors from other countries. Their page says when our check could only partly see the site; then the reports from people matter more.

Every status page shows when our last check ran, the reports of the last 24 hours, where they come from, and the outages of the last 30 days. When five or more people report the same site on one day, that day gets its own page on recent outages.

What we don't do

We don't sell data, show ads or track you across sites. There are no cookies unless you sign in to comment.

We don't guess. If neither our checks nor people show a problem, the page says so, even when a site is in the news.

For website owners

Put the live status of your site on your own pages with a status badge or the status card ("Embed" on any status page).

Is something wrong on your site's page? Tell us and we will take a look.

Who runs DownSonar

DownSonar is run by Pixelsolutions B.V., the Netherlands. Our checks run from servers in Germany and Spain. Questions, corrections or press: use the contact form.