The Best PortChecker Alternatives in 2026

localhost.run creates an SSH tunnel that connects web applications on a local computer to the internet.

Check whether network ports are open and test port forwarding or router connectivity with PortCheckers.

Trace network latency by continuously pinging each host between a computer and its destination.

CanYouSeeMe checks whether an internet connection has an open port and verifies port forwarding.

Check for Cloudflare tests whether a domain uses Cloudflare DNS and checks global locations.

Arcai provides NetCut and router utilities for controlling Wi-Fi networks on Windows and macOS.

Estimate internet download speed in a browser with FAST.com, Netflix’s simple speed test.

Measure internet download, upload, ping, and jitter in a browser with OpenSpeedTest, an HTML5 speed test.

Manage free, dynamic, and static DNS hosting, subdomains, and web forwarding through FreeDNS.

This service runs ping, MTR, DNS, TCP port, and BGP diagnostics from multiple locations.

Cloudflare Speed Test measures download, upload, latency, jitter, and packet loss for an internet connection.

WiFi Analyzer helps Windows users identify wireless network problems and choose a Wi-Fi channel.

Listen on network ports or open a reverse shell with Rustcat, a cross-platform command-line tool.

SpiderSuite provides web crawling, interception, and analysis tools for security testing.

LibreQoS Test measures connection quality and latency while a network is under load.

Globalping runs latency tests and network commands from probes around the world.

Host DNS records for domains with Hurricane Electric’s free DNS service.

Check-Host monitors websites and checks servers, IP addresses, and host availability.

Use Bancuh DNS to filter ads, trackers, malware, and adult content across devices on a network.

ngrok routes and secures traffic to applications, APIs, and AI models running locally or in production.

Enter a MAC address or OUI to find its vendor using IEEE and Wireshark manufacturer data; a REST API is also available.

Packet Sender sends and receives TCP, UDP, SSL, and DTLS packets and supports HTTP requests.

Meshtastic is open-source mesh networking software for low-power devices used off-grid.

Resolve and cache DNS queries with Unbound, a validating resolver that supports encrypted DNS protocols.