Free network diagnostic tools for DNS, IP, email and SSL checks
Stage
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Founded
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Based in
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IN
Pricing model
Free
Freemium
Pricing
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Free plan: All 41 tools with unlimited checks, 3 saved domains with daily monitoring, 7 days of history. Pro plan: $29/month for 50 domains, scans every 6 hours, email, Slack, Telegram and webhook alerts, 12 months of history and API access.
Key features
Generate both llms.txt and llms-full.txt files
Edit and reorder content by section before export
Sitemap-aware crawl with fallback to homepage links
Built-in spec validation with status badges
No login, no credit card, no API key required
Crawl up to 50 pages per request
Works with any website type
DNS Lookup - resolve A, AAAA, MX, TXT, NS, CNAME records
Blacklist Checker - query 7 major DNS blocklists
SSL/TLS Certificate Checker - verify certificate chain, expiry and protocol support
Email Deliverability - check SPF, DKIM and DMARC records
WHOIS Lookup - query domain registration details
Reverse DNS (PTR) - check IP to hostname resolution
Port Checker - test common HTTP/HTTPS ports
BIMI Lookup - query BIMI TXT records
Domain monitoring with automated scans
Multi-channel alerts via email, Slack, Telegram and webhooks
What makes it different
Generates both files in one click instead of just one
Edit before export with priority-focused approach
Works platform-agnostically beyond WordPress
Completely free with no signup or storage
41 tools all available free with unlimited checks
Clear sourcing - every result shows its source and what was not tested
Live DNS queries from edge servers via DNS-over-HTTPS
Domain monitoring and alerts with affordable Pro plan at $29/month
The Network Tools