New: a desktop app, no Docker needed →

Drop in a capture. Get a plain-English diagnosis.

Find out why the network is slow, which connections are failing and whether anything looks suspicious, without being a packet-analysis expert. It runs on your own computer, so your captures stay with you.

Windows, macOS and Linux. No account or card needed. Just one file to check? Try it in your browser - nothing to install.

What it tells you

The answer comes first. The evidence is underneath when you want it. Click a screenshot to zoom in.

Network health details listing DNS resolvers slowest first, with 192.168.1.2 at 889 ms, and the slowest individual lookups
What's slowName lookups, connections and web servers, each rated good, warning or poor, with the worst offenders named. So you know whether to look at the network, the server or DNS.
Findings list with one expanded to show when it's often harmless and what to check next
What looks wrongA device calling home on a timer, a password sent unencrypted, an old protocol still in use. Each one explained: what it means, when it's harmless and what to do next.
Trends across six captures: DNS response time rose from 28 ms to 712 ms
What changedCompare captures over time and spot the day things got worse, like DNS going from 28 ms to 712 ms since Wednesday.

Need to explain it to a manager or a vendor? One click makes a report you can hand over. See a sample.

How it works

About two minutes from download to diagnosis.

1

Download it

One file for Windows, macOS or Linux. No installer, no account, and no Docker.

2

Open a capture

Drop in a .pcap or .pcapng file from Wireshark, tcpdump, a firewall or a router. No capture to hand? Load the sample that comes with it.

3

Read the diagnosis

See what's healthy, what isn't and what to check next, in plain English.

Everything happens on your computer. Captures are never uploaded, and the app sends no usage data. How privacy works.

Free to use. Pro when you need more.

The same download does both. A license key unlocks Pro.

Free
£0
  • Health check for DNS, connections and web servers
  • The three worst problems of each kind
  • How many findings there are, and what kind
  • A one-page summary report
  • Captures up to 1 GB
Download free
Pro
£49.99 / year
  • Every problem and every finding, explained
  • Trends and before-and-after comparisons
  • Incident reports with your logo
  • Automatic analysis and alerts
  • Captures up to 5 GB, unlimited history
Try Pro free for 14 days

Compare Free and Pro in full · See every feature

Made for whoever gets handed the capture

IT generalists, small teams and managed service providers who need an answer, not a packet-analysis course. If you already use Wireshark, it's a fast first pass before you dig in. How they compare.

A real person behind it

Built and supported by Stuart Mathieson. Questions go straight to [email protected]. About the project.

Private by design

No analytics or tracking. Your captures and results never leave your computer. Read the details.

14-day refund

Your first Pro payment is refunded in full if you ask within 14 days, no questions asked. See the policy.

Try it on your own capture

Free, and about two minutes to get going.

Running it on a server for your team? Use the Docker setup.