Audit your active network connection parameters with our free Connection Type tool. Inspect connection profile classes (WiFi, 4G, 3G), estimated downlink bandwidth (Mbps), Round-Trip Time (RTT) latency, and Data Saver flags directly inside your browser with complete privacy.
Open the tool to trigger automatic navigator.connection API queries.
View estimated downlink bandwidth (Mbps) and connection profile type.
Check round-trip time latency (ms) and Data Saver preference flags.
Queries navigator.connection interface for real-time network layer telemetry.
Listens for online, offline, and connection change events dynamically.
All diagnostics execute in local browser memory. Zero network logs are transmitted remotely.
The W3C Network Information API (navigator.connection) provides client-side JavaScript access to underlying network layer telemetry. Key attributes include effectiveType (e.g., '4g', '3g'), downlink (Mbps bandwidth estimate), and rtt (round-trip time in milliseconds).
The saveData property reflects user-enabled Data Saver preferences, allowing progressive web applications to conserve mobile bandwidth by serving compressed assets.
Listening for the change event on navigator.connection enables web applications to dynamically adjust image resolutions and video streaming bitrates as user connectivity shifts between WiFi and cellular networks.