FREE TOOLS · IT AND SECURITY
Free IT tools for domain, email, and risk checks.
Get a full report on your domain, or check one thing at a time: SPF, DMARC, SSL, security headers, DNS, blacklists. The scanners need a free account; the password checker and phishing quiz run in your browser.
- Website & domain report
- SPF, DMARC and SSL checkers
- Password strength checker
- Phishing quiz
- Scanners are free with an account
Tools are built by NHM Ohio to support practical managed IT, cybersecurity, and cloud operations.
- Domain Report
- Email Checkers
- SSL Checker
- Password Checker
- Phishing Quiz
How to get the most from these tools
- Start with the Website & Domain Report. It runs every check at once, and you can send the report to your IT partner as a link.
- Every finding links to a page that says what it means and how to fix it. The whole list is on what we check.
- Use the Phishing Quiz in team meetings. Short, memorable practice beats a once-a-year training video.
- When you are ready for ongoing monitoring and alerting, pair an account with the DomainGuard mobile app for notifications on the go.
Domain and website checkers
Each one runs on your domain in about half a minute and explains every result in plain English. Any of them can show the whole report, and you can share it with a link.
- Website & Domain ReportOne report on your email security, DNS, SSL, security headers, cookies, registration and reputation, with a link you can share with your IT provider.
- Email Security CheckerCheck SPF, DKIM, DMARC, MX, MTA-STS and TLS-RPT for your domain and find out whether your email can be spoofed or will land in spam.
- SPF CheckerCheck your domain's SPF record: whether it is valid, whether it stays under the 10-lookup limit, and how strictly it treats unlisted senders.
- DMARC CheckerCheck whether your domain has a DMARC record, what its policy is, and whether it protects your customers from email sent in your name.
- DKIM CheckerCheck whether your domain publishes DKIM keys for common mail providers, so receivers can verify your email is really from you.
- SSL CheckerCheck your website's HTTPS: a trusted certificate that matches your domain, the HTTP-to-HTTPS redirect, HSTS and CAA records.
- Security Headers CheckerCheck your website's HTTP security headers (CSP, HSTS, X-Frame-Options and more) and cookie flags, with a fix for each one missing.
- DNS CheckerCheck your domain's nameservers, redundancy, MX records and CAA records, and find the DNS problems that take websites and email offline.
- Blacklist CheckerCheck whether the servers behind your domain are listed on the SpamCop and Barracuda blocklists, which some mail providers use to reject email.
- Domain Expiration CheckerCheck when your domain expires, who it is registered with, how old it is and who hosts the website, so a lapsed renewal never takes your site and email down.
See all 60 checks and what each one means · What DomainGuard keeps watching after the first scan
Most Popular
Start with a free domain or IT health scan
Domain Checkup
Check your domain's SPF, DKIM, DMARC, MX and nameservers to see why email lands in spam or can be spoofed, with the fix for each record.
Run Free ScanIT Checkup
Scan your website for SSL issues, security headers, email authentication, DNS health, and more. Get an IT health score.
Run Free ScanLookalike Domain Check
Find out whether someone has registered a domain that looks like yours and could be used to email your customers.
Run Free ScanSecurity Dashboard
Security Dashboard
Monitor domains, scan for vulnerabilities, check HTTP headers, track breaches, and manage compliance — all in one place.
Use Security DashboardDomainGuard Plans
Compare Free, Starter, Pro and Enterprise. Scanning is free with an account; paid plans re-check your domains automatically every day and add DMARC reports and SEO.
Use DomainGuard PlansAssessments & Comparisons
IT Plan Finder
Answer a few questions about your business and get the managed IT or device protection plan that fits, with a monthly estimate.
Use IT Plan FinderFree IT Checkup
Scan your website for SSL issues, security headers, email authentication, DNS health, and more. Get an IT health score.
Use Free IT CheckupManaged IT vs Break-Fix
Compare proactive managed IT with reactive break-fix support. Understand the cost and risk difference before deciding.
Use Managed IT vs Break-FixEducation & Awareness
Password Strength Checker
Check how strong your password is with entropy analysis and crack time estimates. The password value is analyzed in your browser and not submitted to NHM.
Use Password Strength CheckerPhishing Email Quiz
Can you spot the phishing emails? Test your skills with realistic examples and learn the red flags to watch for.
Use Phishing Email QuizDeveloper API
Run the same checks from your own scripts or from Claude over MCP. API keys come with the Pro and Enterprise plans.
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Need professional IT support?
Our free tools are just the beginning. Contact us for professional IT security and managed services.