Free website and server check tools
Pick a check below - every tool runs from 300+ locations.
HTTP check from 300+ locations worldwide
Host checker (HTTP)
Checks your website with an HTTP request that imitates a real visitor loading the page.
Website speed test
Loads your page like a real visitor and reports the load time and the metrics that slow it down.
DNS lookup
Queries public DNS servers from your chosen locations to check how a domain resolves for local ISPs.
Ping test
This test verifies if the site or hardware is online. A failed ping may indicate server unavailability or disabled ICMP. Multiple server failures could suggest potential bans in certain countries or accidental blacklisting due to past DDoS attacks.
Traceroute online
Similar to the 'traceroute' program in Linux and macOS or the 'tracert' program in Windows, this check traces the path from the customer to the site, evaluating each hop along the way. It helps identify weak junctions and determine if delays are due to local or network-related problems.
Open port checker
This check monitors network applications by examining a specific port via TCP. An open port indicates normalcy, while a closed port or server unavailability requires further analysis using other check types.
DNSBL Check
Ensures the site, domain, or IP is not listed in popular DNS blacklists. Even a healthy site could be accidentally listed, impacting customer trust and search engine rankings. Staying out of DNS blacklists is crucial for maintaining a site's reputation.
Whois Check
Provides details about the person or company that owns the domain, offering valuable insights into the entity behind the website.
SSL Checker
Certificate expiry, issuer, chain and TLS version from 300+ locations
Russian Black List
Checks whether a website, domain, or IP address is blocked in Russia by Roskomnadzor, the country's internet regulator.
Web Risk
Examines URLs against Google's updated lists of unsafe web resources, including phishing and deceptive sites, as well as those hosting malware or unwanted software. This check safeguards users from potential security threats.
Website Down Checker
Instantly checks if a website is down for everyone or just for you, testing from multiple worldwide locations to rule out local network or ISP issues.
Uptime Calculator
Converts an SLA uptime percentage into the downtime it allows per day, week, month and year, and works back the other way from downtime you observed. Pure arithmetic in your browser: no check runs and no account is needed.
MX Lookup
Lists a domain's MX records from several locations, then checks port 25 and the blacklists of each mail server on demand.
Certificate Decoder
Paste a PEM certificate or CSR and read its subject, SANs, validity, key and signature, decoded in your browser.
SEO checks
Noindex Checker
Shows whether a page tells search engines not to index it, through the robots meta tag or the X-Robots-Tag header.
Robots.txt Tester
Tests whether robots.txt blocks a URL for all crawlers and whether the page is listed in the sitemap.
Canonical Checker
Finds the canonical URL a page declares and whether it points to itself, another URL or another host.
Crawl site
Checks referred pages from given root URL. As Web http check collects status and time metrics. In addition, collects SEO errors and warnings and linking information.
13 check types, one dashboard Explore monitoring features