Many sites can learn this much from your connection.

NetInfo checks your connection the way a server, a script, or a stranger's link might — then lays out what it finds on one page, in plain language.

Zero installRuns in any browser
curl-friendlyPlain text or JSON from a terminal
ShareableSnapshot reports that expire
live
IP address
ISP
DNS resolver
WebRTC path

Blacked out because they come from the network, not your browser. Your IP is visible to every server you connect to (your ISP is inferred from it); DNS resolver and WebRTC details only surface when a test page actively probes for them. Reveal yours on NetInfo.

0signals read
0permission prompts
0mstime taken
Read by this page's script, inside your browser. Nothing is uploaded. A site running a similar script could derive an ID like this from the same values — this one is a simplified demo.

What a website can see without asking

Most of this needs no login, download, or permission prompt. Some of it travels with every request; the rest can be collected by a page's scripts. NetInfo just makes it legible.

IP & ASN

Your public address is sent with every request, and it maps to a network operator — typically your ISP, or an employer, host, or VPN provider.

Location & timezone

Approximate city, region and timezone, inferred from your IP with GeoIP databases. Precision varies: finer on some fixed lines, coarse on mobile networks, and misleading behind a VPN or proxy.

Browser & device fingerprint

Screen size, fonts, hardware details, and canvas rendering — signals a script can collect and combine into a signature that helps trackers recognise your browser across sites.

DNS resolver

Sites don't see this by default, but a test page can trigger unique lookups to find out which resolver handles them. A resolver outside your VPN can hint at your real ISP or region.

TLS & HTTP stack

Protocol version and cipher choices that can hint at automation tools, outdated clients, or an unusual proxy in front of you.

WebRTC path

A separate connection channel that, in some browser and VPN setups, can reveal your real IP even when other signals say you're masked.

Bot & fraud signals

Trust scores that sites and CDNs may use to decide how to treat you — sometimes flagging normal connections as suspicious for reasons you never see.

Why this is worth five minutes

Privacy used to mean keeping your name off a form. Now it also means understanding the quiet signals your browser and network can give away before you've typed anything.

Your connection can act like a name

An IP address, an ASN, and a device fingerprint can be stable enough to help build a profile — no cookie required, and nothing for you to delete afterward.

One click connects the dots

A page you land on can start collecting fingerprint signals as soon as its scripts run. That can be enough to link you to other sessions — and if your setup leaks through a resolver or WebRTC, to hint at your real network behind a VPN.

Awareness is the free defense

Much of this is configuration, not a product you buy: choosing a resolver, disabling WebRTC when you don't need it, checking what a fingerprint reveals. You just need to see it first.

How NetInfo treats your data

A diagnostic tool that watches your connection should be held to a higher bar than the sites it's warning you about.

Nothing stored unless you share

iCloudflare may still log your IP and approximate location for its own operational metrics, separately from anything NetInfo stores. A few checks (DNS test, speed test, IP lookups) also contact the public services listed under Credits.

Your IP and approximate location come from Cloudflare's edge, because any server you connect to can see them. Browser and device signals are read on your own device. NetInfo keeps no copy of your report unless you choose "Share Report" — and that copy deletes itself after 3 days.

No account, no cookies

Nothing to sign up for and nothing to opt out of later. NetInfo itself sets no tracking cookies — the report just runs and shows you what it finds.

Never sold, never profiled

iThis is written into the Terms you accept on your first visit to the dashboard. The public services it contacts to work (IP checks, DNS test, map tiles, CDNs) follow their own privacy policies.

No ads, no third-party analytics, no visitor profiles. We don't sell personal information, and there's no user database to leak — the only thing we ever store is a report you chose to share.

One report, every angle

NetInfo breaks your connection into sections you can actually read, then lets you jump straight to any of them.

Network Intelligence

ASN, ISP, city, edge PoP, distance to server, and EU-membership status, read straight from the edge.

System Intelligence

Browser, OS, hardware, battery, sensors, permissions, and locale — the kind of signals fingerprinting scripts commonly collect.

Privacy Shield

WebRTC leak check, ad and tracker blocker detection, GPC/DNT signal status, canvas defense, and Tor route detection.

DNS Leak Test

Shows which resolvers are handling lookups from your network, so a VPN's promises can be checked rather than assumed.

Speed Test

Throughput and latency measured against the nearest Cloudflare edge, over the path your traffic actually takes.

Global Ping Matrix

Round-trip times to points around the world, so you can see how your connection looks from elsewhere.

Command-line access

Every field available as plain text or JSON — script it, pipe it, or drop it into another tool.

Shareable snapshots

A frozen report link with an expiry, for handing someone a result without giving them a live view of your machine.

Instant search

Press Ctrl+K to jump to any metric in the report — no scrolling through sections you don't need.

Built on infrastructure we didn't have to build

NetInfo runs on Cloudflare's edge and leans on a handful of open, public services rather than reinventing them.

Infrastructure & edge network

Cloudflare Workers, KV storage, and geo-IP data

Map engine & geodata

Leaflet.js, Carto (Dark Matter & Voyager tiles), OpenStreetMap contributors

Diagnostics & public APIs

Cloudflare Speed Test, Bash.ws DNS leak test, ipify, icanhazip, ident.me

Interface

Tailwind CSS, Lucide Icons, system fonts

Find out what you're exposing.

One page, your real connection, no account needed.

Visit NetInfo