nmap.online is a βFree Online Port Scanner - Nmap Web Interface.β In essence, it turns common Nmap scanning capabilities into a web-based interface. Users enter a target to start a scan and can view the scan status, open ports, elapsed time, and details such as port, protocol, state, service, and version. Full port details require scan credits to unlock.
Based on the site content, it supports scan types such as Quick, Service, Aggressive, and Custom, along with service version detection (-sV), operating system detection (-O), port range configuration, and timing options from T0 Paranoid to T5 Insane. These features are suitable for initial checks of public attack surfaces, service identification, and ad hoc security validation. It is delivered as an online SaaS/web interface, so there is no need to install Nmap locally. However, it is not a firewall, EDR, or continuous monitoring platform; it is better understood as a one-off external-perspective scanning tool.
Pricing is credit-based with no subscription. The page shows 10 Scan Credits for $1.99. Each credit unlocks one full scan result; credits do not expire, no account is required, and payment is processed securely through Stripe. Credits are available immediately after purchase. This is cost-effective for low-frequency users. If you need large-scale or continuous scanning, the page does not show bulk packages or enterprise pricing.
The advantages are that it is easy to use, covers common Nmap options, supports pay-as-you-go usage, and does not require an account. It is well suited for quickly verifying open ports and service versions. The limitations are also clear: the site content does not disclose compliance certifications, data retention policies, scan authorization checks, team permissions, audit logs, alerts, APIs, or SIEM integrations. Full results require paid credits, and the free portion may only be enough for a preliminary assessment.
It is better suited to individual security practitioners, small teams, developers, and operations engineers who need temporary public port checks under proper legal authorization. It is not suitable as an enterprise-grade vulnerability management platform, internal asset inventory tool, or compliance audit solution. The site content does not provide information about access from China, and Stripe payments may also be affected by local bank card support and network conditions. Alternatives include local Nmap, Masscan, Shodan, Censys, and security checkup or vulnerability scanning services from domestic cloud providers.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on nmap.online official site.
nmap.online is an Unknown Cybersecurity provider. TG4G tracks its product information, an overall rating of 7.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach nmap.online directly.