ZoneWatcher
Expirity
Domain-Monitor.io
Klaxel
Oh Dear!
DomainRisk.io
Domain Watchdog
Domainyze
Cert Decoder
Cert Decoder is a free online tool that helps you decode X.509 SSL/TLS certificates in PEM format. It instantly shows important information like the issuer, expiry date, SAN entries, and fingerprint. All data is processed locally in your browser, so nothing is ever sent or stored elsewhere.
ZoneWatcher Cert DecoderZoneWatcher's answer
ZoneWatcher is the only DNS monitoring solution that integrates directly with dozens of DNS service providers such as AWS, CloudFlare and Azure. This allows us to fetch your DNS records in full and quickly detect changes in minutes, not in days.
Cert Decoder's answer:
Simple, fast, and reliable. Some similar tools can’t even decode basic certificates. I rigorously tested my tool with many real-world certificates and covered several edge cases where competitors fall short.
ZoneWatcher's answer
ZoneWatcher focuses on providing tools to system administrators, IT teams, agencies, and consultancies which manage many domains.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
ZoneWatcher's answer
It began in 2016 out of some frustration I was having with consulting clients who would modify their DNS records incorrectly, breaking their email and/or website until I was able to get them back online. It was frustrating digging through emails or technical documents to find the original values before they had made their changes.
I wanted a tool that could automatically backup those records to make reverting easy while at the same time notifying me of any changes so issues could be proactively fixed before their business was impacted.
Cert Decoder's answer:
I built certdecoder.com over the weekend for my own needs. Sometimes in my work, I need to verify and check certificate details.
Cert Decoder's answer:
certdecoder.com was built using just JavaScript and HTML—simple, fast, and with all processing happening locally in your browser, so no certificate data is sent to any server
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
Based on our record, Cert Decoder seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Why? Because I built certdecoder.com and couldn’t find a decent place to submit it. So I said screw it — I’ll build my own. With blackjack and hookers. - Source: dev.to / over 1 year ago
Expirity - Never lose a domain again. Monitor expiry dates, DNS changes, SSL certificates and nameserver alerts across your entire portfolio. Free up to 50 domains.
Domain-Monitor.io - Looking for the complete domain and website uptime monitoring solution? Domain Monitor keeps an eye on your website, cron, SSL and domain name 24/7 and will alert you through Email, SMS and web when something stops working.
Klaxel - Domain-health monitoring for MSPs. Watch every client domain across every registrar — expiry, TLS, DNS, email-auth (SPF/DKIM/DMARC), web security — graded A–F, white-labeled per client, alerts to email, Slack/Teams or your PSA. From $99/mo.
Oh Dear! - Website health monitoring for your entire site, not just the homepage.
DomainRisk.io - Monitor WHOIS, DNS, SSL and email security across your domain portfolio with an explainable risk score, subdomain takeover detection, change alerts and audit-ready PDF reports. Free trial, no credit card.
Domain Watchdog - Domain-health monitoring for MSPs. Watch every client domain across every registrar — expiry, TLS, DNS, email-auth (SPF/DKIM/DMARC), web security — graded A–F, white-labeled per client, alerts to email, Slack/Teams or your PSA. From $99/mo.