Free, fast, and privacy-friendly network and security tools for developers, sysadmins, and security professionals.
NetworkToolz was built with a simple goal: give everyone access to professional-grade network and security diagnostic tools — completely free, with no registration, no paywalls, and no data selling.
Whether you're a developer debugging DNS issues, a sysadmin checking server security, or a business owner verifying your email setup, our tools give you instant, accurate results without the friction of signing up or paying for enterprise software.
NetworkToolz is supported by non-intrusive advertising and affiliate partnerships with services we genuinely recommend (like domain registrars and VPN providers). This lets us keep all tools completely free while covering our server and development costs.
We will never sell your data, require registration to use tools, or hide basic functionality behind a paywall. That's our promise.
We'd love to hear from you — whether it's a bug report, feature request, or just a hello.
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