Internet diagnostic tools
Everything to help pinpoint where things went wrong: the website, your network, or somewhere in between. Free, registration-free, and explained in plain English.
A website won't open?
We will test it from a server in Moscow and from your device — and show you exactly where it gets stuck.
All tools
Each tool explains the result in words, not just numbers.
Free and without registration
Check website
We will open the site from a server in Moscow and show where it gets stuck: DNS, connection, encryption, or server response.
OpenMy IP
Your address, provider, network number, and city — how websites see you. Plus what else your browser reveals.
OpenDNS Check
We query six DNS servers at once and highlight if any of them responds differently from the others.
OpenSSL Check
Who the certificate was issued to, who signed it, days left, and why a browser might flag it.
OpenInternet Speed
Ping, download, and upload speeds to Moscow — compared against weekly median scores across providers.
OpenIP Lookup
Who owns this address: provider, organization, AS number, country, and city. Supports IPv4 and IPv6.
OpenAPI for Developers
Statuses for 85 services in JSON without an API key, plus monitoring badges for your own websites.
OpenOutage Map
Where reports in Russia are highest right now — by region, over the past hour, and the past 24 hours.
Open
What to check if…
A quick cheat sheet: which tool to use in each situation.
- A website or app won't openCheck website
- Everything opens, but slowlyInternet Speed
- The browser says the connection is not secureSSL Check
- The wrong site opens or "server not found"DNS Check
- Not sure if the VPN is workingMy IP
- An unfamiliar address in the server log — whose is it?IP Lookup
- Seems like it's down for everyone aroundOutage Map
- Want to display status badges on your websiteAPI for Developers