CoolTR is a modern, dark-themed Windows network diagnostic tool — live MTR-style tracerouting, continuous ping monitoring, and deep network info lookups in a single desktop GUI.
The connection feels bad — video calls stutter, a game lags, a server halfway across the world responds in bursts — and a single tracert run tells you almost nothing. It probes each hop once and exits, so intermittent packet loss slips right past it. To actually diagnose the path you end up juggling ping windows, traceroute output, and half a dozen browser tabs for WHOIS, GeoIP, and ASN lookups.
CoolTR puts all of it in one window. Enter a hostname or IP, hit Start, and watch every panel populate in real time — a live per-hop MTR table, continuous ping stats with a timestamped log, and DNS, GeoIP, ARIN, BGP, and WHOIS data on the target.
CoolTR runs three diagnostics at once against your target:
tracert to discover the route, then continuously pings each hop at the correct TTL to build per-hop statisticsCoolTR is free and open source under the MIT license. It requires Python 3.8+ on Windows 10 or 11 — no admin rights required.
setup.bat installs the optional dependencies (requests, dnspython, python-whois); the app falls back gracefully if any are missing — core traceroute and ping work with only Python's standard library. You can also launch it directly with python cooltr.py.
Source and documentation: github.com/VAROIndustries/CoolTR
ping.exe and tracert.exe binaries, so no elevated privileges are needed.requests, dnspython, python-whois) enable the GeoIP, ARIN, BGP, advanced DNS, and WHOIS lookups.