Free tools for website diagnostics
Online checks for sites and domains. No sign-up — just open and use.
Available now
3 toolsCheck if a site opens from Russia
A real request from our server in Russia across five network layers — DNS, TCP, TLS, HTTP, content. Detects DNS spoofing, IP blocks, SNI-based DPI and modern post-handshake TSPU blocking.
Domain DNS records (dig)
View DNS records for any domain: A, AAAA, MX, TXT, NS, SOA and more. A query to a public resolver showing TTLs and values — like dig, but in the browser.
Redirect checker
The full redirect chain and HTTP headers at every step, with a choice of User-Agent (Googlebot, mobile, curl). Catches stray 302s, loops and cloaking. With text output.
Coming soon
2 in progress- Coming soon
TTFB metric
A breakdown of response time into connect / TTFB / load — to see whether the network, backend or render is slow.
- Coming soon
robots.txt watcher
We watch robots.txt for changes and alert you if SEO access to the site suddenly changes.
Full development plan — on the roadmap.