Traceroute.im perfroms a traceroute from the traceroute.im server to the site you specify. The local tracert program performs a traceroute from your computer to

Traceroute.im perfroms a traceroute from the traceroute.im server to the site you specify. The local tracert program performs a traceroute from your computer to the site you specify. Additionally, tracert (windows variant) usually does ICMP probes while I assume traceroute.im uses Linux traceroute and thus UDP probes, but that shouldn't change the route your trace takes.