Down For Everyone Or Just Me (#29)
DFEOJM let’s you see if a website is down for everyone in the world or just for you.
ViewDNS.info (#28)
ViewDNS is the omnibus DNS tool for everything and everyone! Reverse IP, Reverse Whois, IP History, a full DNS report, Reverse MX, Reverse NS, IP Locator, whois, DNS propagation check, port scanner, and more!
MX Toolbox (#27)
MX Toolbox lets you examine your domain’s MX, SPF, DKIM, and DMARC records in your DNS settings.
What’s My Chain Cert (#26)
WhatsMyChainCert.com can be used to test both your certificate and its intermediary certificates. Since these can expire at different times and some browsers cache the intermediary certs, this tool can help you identify problems when configuring your web server.
BuiltWith (#25)
BuiltWith is a tool for programmers and marketing engineers to determine what technology other people’s websites are built using.
Ahrefs Backlink Checker (#17)
Use Ahrefs Backlink Checker to check the inbound links from other people’s website to your website.
Google Page Speed Insights (GPSI) (#2)
GPSI — Google Page Speed Insights is also a page speed optimizer, but it has fewer frills than WebPageTest and gives less information. It does...
WebPageTest.org (#1)
July is marketing & optimization month. Every day this month I will introduce a new tool for marketing or web optimization. To kick things off...