Lag Check widget | The Net Fix

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Lag Check

Measures your speed and how much lag rises when the line is busy (bufferbloat). Takes about 30 seconds.

Full Lag Check on The Net Fix (opens in a new tab)

Internet diagnostics & fixes

Free browser tools that find why your internet lags, buffers or drops, and walk you through the fix: speed and lag under load, Wi-Fi, DNS, gaming routes, video calls, privacy leaks and business security. No app to install.

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The Net Fix is a free internet diagnostic toolkit that runs in your browser on any phone, tablet or computer. The Test & Optimize runs every check in one click, then walks you through the fixes: a speed test with lag under load (bufferbloat), jitter and packet loss, a lag spike finder, DNS resolver speed, WebRTC leak and NAT type, IPv6 and HTTP/3 checks, game server ping, video-call quality, streaming stability and an open-port exposure scan. Each result says whether the problem starts in your home, on your line or beyond it, then links the fix: Smart Queue (SQM) settings for your router, Wi-Fi changes, a low-lag DNS that blocks ads and trackers, and per-game guides. No app can make your plan faster than what you pay for; The Net Fix finds and fixes the bottlenecks that cause lag, and proves it with a re-check.

Speed tests measure against Cloudflare's network using the open-source @cloudflare/speedtest engine. We never store your IP address or the sites you visit. As an Amazon Associate, The Net Fix earns from qualifying purchases.

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