Find Out What's Wrong With
Your Network Connection
Test for ISP throttling, bufferbloat, packet loss and high latency on Windows. Honest, in-depth diagnostics for gamers, streamers and power users — with one-click Quick, Gaming and Advanced modes, plus Wi-Fi, DNS and CGNAT checks, all measured locally on your PC.
Everything You Need to
Understand Your Connection
A complete toolkit of honest, standards-based diagnostics — from one-click diagnosis to deep ISP and Wi-Fi inspection.
One-Click Diagnosis
Three one-click modes — Quick for a fast health snapshot, Gaming for competitive FPS scoring, and Advanced for a full-scale expert report. Every test is graded with plain-language insights.
ISP Throttle & Interference Detection
Detect whether your ISP throttles BitTorrent, QUIC, VPN or OpenVPN traffic, plus DNS hijacking, captive portals and TLS interception.
Speed, Bufferbloat & Latency
Measure real throughput, ping to popular services and game servers, jitter, packet loss and bufferbloat under load.
Wi-Fi & Local Network
Analyze Wi-Fi channels and signal health, scan LAN devices, and run PC-to-PC LAN speed tests — all on your local network.
VoIP, DNS & IPv6
Estimate call quality with a real UDP VoIP MOS test, benchmark DNS resolvers, check DNS/IP leaks and verify IPv6 connectivity.
Private by Design
Diagnostics run locally on your machine. No account, no tracking, no telemetry of your results — and the code is open source.
See NetVeil In Action
A clean, focused interface that turns raw network data into clear grades and actionable insights.
Live Graphs
Real-time visualization of latency, speed and bufferbloat
Letter Grades
Every test scored A+ to F with plain-language verdicts
PDF Reports
Export full diagnostics for ISP support tickets
Simple, Honest Pricing
The core toolkit is free forever. Unlock the advanced Pro tools with a one-time purchase — no subscriptions. Or try them for 30 days first.
Free
Everything you need for everyday network diagnostics.
- Quick, Gaming & Advanced Diagnosis (one-click)
- Ping, Latency & Game Server tests
- Speed Test & Bufferbloat
- Wi-Fi Channel Analysis
- DNS Benchmark, IPv6 & MTU
- Traceroute & Test History
Pro — 30 Days
Try the full Pro toolkit for a month.
- Everything in Free, plus:
- ISP Throttle Detection (BitTorrent / QUIC / VPN)
- ISP Interference Detection (DNS / TLS / captive)
- Network Stability monitoring
- VoIP Quality (MOS) test
- CGNAT & DNS / IP Leak checks
- LAN Scanner & PC-to-PC LAN Speed test
- Twitch upload (RTMP) test
Pro — Lifetime
Pay once. Own every Pro tool forever.
- Everything in Free, plus:
- ISP Throttle Detection (BitTorrent / QUIC / VPN)
- ISP Interference Detection (DNS / TLS / captive)
- Network Stability monitoring
- VoIP Quality (MOS) test
- CGNAT & DNS / IP Leak checks
- LAN Scanner & PC-to-PC LAN Speed test
- Twitch upload (RTMP) test
Secure checkout & global tax handling via LemonSqueezy.
Ready to Level Up?
Download and run a full network diagnosis in minutes. Free, open source and no signup required.
Download for WindowsWindows 10/11 • Quick install • Free & open source