Free Security Tools

MAG212 CYBER · Tools

Free security tools that respect your privacy.

Fourteen free tools for network engineers, analysts and everyday users. Everything runs in your browser — nothing you type is sent, stored or logged.

For network engineers, administrators and CCNA/CCNP students.

Network, broadcast, host range, wildcard masks, binary view, Cisco commands and a VLSM planner.

Compress and expand addresses, prefix ranges, address types, subnet lists and EUI-64.

Paste a running-config, get a security score and the exact commands to fix every weakness.

Pick a target and options, get the exact Nmap command with every flag explained.

What runs on a port, how risky it is to expose, and how to secure it.

Verify IOS images, ISOs and installers against the vendor’s SHA-256 or SHA-512.

Protect your accounts and spot fake messages.

Grade any domain’s SPF, DKIM, DMARC and MTA-STS — and get the records to fix it.

See who really sent an email: authentication results, Reply-To tricks and every server hop.

Paste a link from an email or text to spot the warning signs, without ever opening it.

Estimate crack time and check whether a password appears in known data breaches.

Cryptographically random passwords and memorable EFF-wordlist passphrases.

For analysts, IT managers and business owners.

15 questions, a risk score by area and a prioritised action plan you can print.

Base64, URL, hex, JWT inspector and IOC defang/refang for safe sharing.

Score a vulnerability, or paste a vector string to see its severity and what each part means.

Need expert help?

MAG212 CYBER offers network and cybersecurity consultation, plus security seminars for organisations around the world.