Traceroute Output Interpreter

Read a traceroute or MTR properly — and stop blaming the hop that is not at fault.

What you paste

Parsed in your browser — never uploaded

Result

ISSUE

That could not be read

Paste the output of traceroute, tracert or MTR.

What this cannot tell you

  • Loss at an intermediate hop is only meaningful if it persists to the destination. Routers generate ICMP replies on their control plane and deprioritise that work when busy, so a hop can show 100% loss while forwarding every packet perfectly.
  • A destination that never replies is frequently normal rather than a fault — a great many hosts and firewalls drop traceroute probes by policy while serving traffic fine.
  • Shows the path at the moment the trace ran, in one direction. The return path can differ entirely and is not visible from here.
  • Traceroute output carries no loss percentage; only MTR reports one. On a plain traceroute the loss analysis has less to work with.
  • Parsed in your browser. Nothing is uploaded, and the output you paste is not stored.

Take this with you

Traceroute Output Interpreter on RunTheTests — free browser-based interpreter tools, no sign-up.