Alternatives to Internet.nl
A web test that checks websites, mail domains and connections for modern Internet standards support. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Internet.nl
A web test that checks websites, mail domains and connections for modern Internet standards support.
Replacements
Listings that take over the same core job as Internet.nl.
Hardenize
A web site configuration tester and monitoring service for network, certificate and security settings.
Hardenize also reports on network, certificate and security configuration for a domain and adds continuous monitoring aimed at organisations, but cannot be self-hosted.
Check Your Website
Free online checker for a domain's DNS, redirects, certificates, connections and mixed content.
Check Your Website audits DNS, redirects, certificates and mixed content with an A+ grade, but lacks Internet.nl's IPv6, DANE and RPKI tests.
Web Check
Open-source, self-hostable tool that analyses a website's DNS, security, headers and other public details.
Web Check is open source and self-hostable with Docker, covering DNS, headers and security in one report, though it focuses less on standards like DANE and RPKI.
Also worth comparing
These listings name Internet.nl as their own alternative, so the relationship runs both ways.
CheckTLS
A web tool that tests whether a recipient's mail server accepts secure TLS connections for email.
Internet.nl tests mail domains for STARTTLS, DANE and DMARC alongside website checks, is free and can be self-hosted with Docker.
GF.dev TLS Cipher Suite Scanner
A free web tool that reports the TLS version and cipher suite a server negotiates.
Internet.nl checks TLS as part of a wider test of IPv6, DNSSEC, DMARC, DANE and RPKI support, and can also be run yourself from a Docker package.
HTTP Observatory
Mozilla's web tool that grades a site's HTTP security headers and gives fix recommendations.
Internet.nl tests a domain against a wider set of standards such as IPv6, DNSSEC and TLS, and can also be self-hosted with Docker.
MXToolbox
A web-based suite of DNS, MX, SPF, DMARC and blacklist lookups for diagnosing email delivery.
Internet.nl tests mail domains for DMARC, DANE, DNSSEC and TLS in one combined report, is free and can run self-hosted through Docker.
SSL Labs Server Test
A Qualys web service that analyses the TLS/SSL configuration of a public web server.
Internet.nl checks TLS as part of wider standards tests such as IPv6, DNSSEC and DMARC, and can be self-hosted with Docker.
Similar software
Related functionality, not a direct replacement.
Zonemaster
An open-source DNS validation tool that checks a domain's delegation and zone for configuration errors.
DNSViz
An open-source tool suite that visualizes DNS zones and the DNSSEC authentication chain.
intoDNS
A free web tool that checks a domain's DNS and mail server health and configuration.
