Free · No sign-up · Privacy-first

Debug the network like you mean it. Find the real cause, fast.

Free tools from security and network engineers: open HAR files privately in your browser, trace a path hop by hop with MTR, and decode tokens. Then read how real incidents were solved.

Your files stay with you

HAR files are parsed locally in your browser and never uploaded. That's important, because HARs often contain cookies and tokens.

Real network vantage point

MTR tests run from our server over ICMP, TCP or UDP, so you can compare the path from outside your network.

Built for 2 AM incidents

Status codes, redirect chains, timings, server IPs and security headers all on one screen, with nothing to install.