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Scanward — External Security Scanner & Attack Surface Monitoring
Free external security scanner and domain security scanner. Scanward monitors your domains for SSL, DNS, email security, HTTP headers, uptime, and domain exp...
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91 % |
|
HostWithShery — Website & Domain Troubleshooting Tools
Find out why your website or business email is not working. Check DNS, hosting, SSL, redirects and email configuration, then follow a clear repair path.
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91 % |
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HeaderCheckr | Web Debugging & Security Tools
Run a domain overview for security headers, SSL certificates, redirects, DNS records, compression, and HTTP protocol support. Free, fast, and private.
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91 % |
|
GoodPing — free website uptime monitoring & network tools
Check if a website is down, test ping and response time, and inspect DNS, SSL, headers and ports. Free live checks, no signup — plus free uptime monitoring w...
|
90 % |
|
Website Uptime, SSL, DNS and Server Monitoring | Web Hosting Monitor
Monitor website uptime, SSL certificates, domain expiry, DNS, email DNS, cron heartbeats and IP/domain blacklist status from one clean dashboard.
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90 % |
|
Developer tools for the parts of the internet that break: DNS, SSL, HTTP & email | Kirk Diamond
Free DNS, SSL/TLS, HTTP and email checks from a real server. Domain health grades, SPF/DKIM/DMARC, cert chains. Curl-friendly, no sign-up, nothing stored.
|
90 % |
|
WebsiteInfo
Enter a domain and get certificate expiry, SPF/DMARC email spoofing protection, DNS setup and security headers checked in seconds. Free, no signup.
|
89 % |
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Domain Health & Security Monitoring | CloudSpex
Monitor DNS, SSL, email security, uptime, redirects and domain risks with clear root-cause findings and actionable remediation guidance.
|
89 % |
|
Test DNS, SSL/TLS, HTTP and HTML at htmlyse.com
Website tune-up made easy with htmlyse, a tool for checking your website's DNS, SSL/TLS security, HTTP headers and cleaning up HTML source.
|
89 % |
|
Free SSL Certificate Generator — No Account, No Credit Card | freessl.cloud
Generate a free SSL certificate in minutes — no account, no credit card, no upsells. Wildcard, multi-domain SAN, HTTP & DNS validation. Trusted by Let's Encr...
|
89 % |
|
Uptime & SSL monitoring · YakGuard
Uptime monitoring for website, SSL, domain, DNS and cron checks, public status pages, broken-link crawling, and a free plan that allows commercial use. Paid...
|
89 % |
|
HSTS Studio — HSTS and preload checker
HTTP Strict Transport Security tells browsers to only ever reach your site over HTTPS. Check your header, and whether your domain qualifies for the browser p...
|
89 % |
|
CrowWake — DNS, email auth, security & performance watch
CrowWake watches SPF, DKIM, DMARC, SSL, security headers and performance — and crows when something breaks. First domain free.
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89 % |
|
Free DNS, RDAP, Email Security & Server Tools | LDNS.com
Look up DNS records, RDAP/WHOIS, email authentication (SPF, DMARC, DKIM, BIMI), TLS certificates, security headers, ASN, and subdomains for any domain. Insta...
|
88 % |
|
UtilUp
Free online tools for everyone: text, time, web, DNS, JSON, PDF, encoders and converters, all in one fast, easy-to-use toolbox.
|
88 % |
|
DotDeeper - Free Domain, DNS & SSL Monitoring
Free domain monitoring for DNS, nameservers, SSL certificates, and SPF/DKIM/DMARC email auth. Instant alerts the moment something changes.
|
88 % |
|
CheckDOS - Domain inspection platform
CheckDOS inspects DNS, mail, SSL, hosting, CMS, technology, security headers and network reachability from one domain search.
|
88 % |
|
Free Website Status, DNS & SSL Checker | StatusHaven
Check whether a website is reachable, inspect DNS records, and review SSL certificate details in one free, privacy-aware StatusHaven check.
|
88 % |
|
Montastic — Free Website Uptime Monitoring Since 2005
Free website uptime monitoring. Check any URL for downtime, SSL, DNS, HTTP headers, ports, ping, WHOIS, and email health. No signup required.
|
87 % |
|
Det.cc - Free Online Tools for Network Diagnostics and Analysis
Det.cc offers a suite of free online tools for network diagnostics, including DNS record checking, IP lookup, port scanning, and more. Instantly analyze your...
|
87 % |
Detected social media networks