I'm Marlo, an IT professional with 20+ years of hands-on experience. From small business support to specialized industrial systems. I built IT Admin Utils because I was tired of the same problem: you're mid-troubleshoot, you need a quick subnet calc or DNS lookup, and every tool either wants your email address, shoves ads in your face, or sends your data off to some server you've never heard of. So, I built the alternative. IT Admin Utils is a free, no-nonsense collection of browser-based tools built specifically for IT admins and sysadmins: Network & Infrastructure (9 tools) Subnet/CIDR Calculator DNS Lookup (A, AAAA, MX, TXT, CNAME, NS, SOA, PTR) HTTP Headers Checker SSL Certificate Checker IP Address Converter CIDR Range Visualiser VLAN Calculator Bandwidth Calculator Port Reference Developer Utilities (6 tools) JSON Formatter & Validator Base64 Encoder/Decoder Regex Tester Cron Expression Builder UUID Generator Hash Generator The non-negotiables I built around: ✅ 100% client-side — your data never leaves your browser ✅ Zero signups required ✅ Zero paywalls ✅ Zero ads ✅ Fast — no bloat, no frameworks fighting each other This is a tool built by an IT admin, for IT admins. I use these myself daily. More tools are in the pipeline — if there's something you'd want to see added, drop it in the comments. itadminutils.com

IT Admin Utils

Free browser-based utilities for IT admins and sysadmins

Free browser-based utilities for IT admins and sysadmins