DNS Checker
Check A, AAAA, MX, NS, TXT, CNAME, SOA, SPF, DMARC, and DNSSEC indicators for any domain. Useful for migration validation, mail authentication review, and quick misconfiguration triage.
Open tool →TLINK PRO Platform
Security diagnostic and intelligence tools, now on TLINK PRO.
DNS, WHOIS, SSL, IP analysis, exposure scanning, email deliverability, header review, threat intelligence — every tool is available at pro.threatgrid.tech/tools. Free public tools require no account.
Free
Public Tools
DNS, WHOIS, IP, SSL, header analysis — no account required.
PRO
Intelligence Tools
IP reputation, exposure scanning, threat feeds, email deliverability.
Monitor
Asset Monitoring
Continuous domain and infrastructure surveillance with alert rules.
AI
Threat Summaries
AI-generated analysis on every tool result and investigation.
Public tools — no account required
Free diagnostic tools for any security or operations workflow.
These tools are open access on TLINK PRO — no login, no account, no friction. Use them for incident triage, migration validation, vendor checks, or daily hygiene work.
WHOIS & RDAP Lookup
Retrieve registration and ownership data via RDAP with WHOIS fallback. Useful for ownership validation, abuse triage, domain investigations, and vendor infrastructure checks.
Open tool →IP Lookup
Look up an IPv4 or IPv6 address to review PTR data, ASN, allocation context, and ownership details. Good for triaging suspicious hosts from logs, firewall alerts, or abuse reports.
Open tool →Domain Lookup
Pull DNS inventory, ownership context, and DNSSEC signals together in one view. Useful for client environment onboarding, confirming delegations, and investigating unknown infrastructure.
Open tool →SSL/TLS Analyzer
Inspect certificate validity, chain details, issuer, expiry, and supported TLS versions. Run this after certificate renewals, CDN changes, or before onboarding a hosted workload.
Open tool →Security Header Analyzer
Review HTTP security header implementation — CSP, HSTS, X-Frame-Options, Referrer-Policy, Permissions-Policy. Identifies missing or misconfigured headers that create browser-layer exposure.
Open tool →PRO tools — included with MSSP tiers
Intelligence tools for deeper analysis and continuous monitoring.
These tools require a TLINK PRO account — included with all ThreatGrid MSSP tiers, or available standalone on request. They go beyond first-pass diagnostics into reputation, intelligence feeds, and exposure analysis.
IP Reputation & Blacklist Checker
Check DNSBL exposure, PTR posture, and reputation signals for a public IPv4 address. Useful before email remediation, outbound server cutovers, or investigating deliverability complaints.
Sign in to use →Threat Exposure Scanner
Run a fast web exposure review and surface issues that may justify a deeper managed security engagement. Ideal for first-pass validation before a consultation or to quickly contextualize a concern.
Sign in to use →Email Deliverability Tester
Validate deliverability posture across MX, SPF, DKIM, and DMARC signals. Run this for new domains, sending infrastructure changes, mailbox migrations, or complaint-driven support cases.
Sign in to use →Threat Index Search
Cross-reference domains, IPs, and URLs against threat intelligence feeds with weighted scoring and evidence. Access monitored asset history, alert lifecycle, and investigation tracking.
Sign in to use →Beyond diagnostics
TLINK PRO is an analyst workspace, not just a tools hub.
The individual tools are the visible layer. Behind them is a full platform: asset monitoring with alert rules, AI-generated threat summaries on every result, investigation tracking, and executive-ready reporting — all in one workspace shared between your team and ThreatGrid analysts.
Asset monitoring with configurable alert rules and threshold triggers
AI-generated threat summaries on every tool result and investigation
Investigation tracking with timeline, notes, and analyst context
Executive reporting portal — board-ready output from analyst work
Included with all ThreatGrid MSSP tiers at every pricing level