Toolbox
Network Tools
Everything runs in your browser — nothing is sent to a server.
🌐 Connection Info
Your public IP, network, and browser environment.
- Public IP
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- Network (ASN / ISP)
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- Location
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- Timezone
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- Browser
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- Platform / Lang
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- Screen
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- Connection
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🧮 Subnet / CIDR Calculator
IPv4. Enter an address with prefix, e.g. 192.168.1.10/24.
📡 Latency Test
Round-trip time from your browser to this server (lns.hk).
🔳 QR Code Generator
Paste text, a URL, or Wi-Fi/config string. Generated locally.
🔑 Key / Password Generator
For provisioning gear and pre-shared keys. Uses the browser's secure RNG.
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🏷️ MAC / OUI Lookup
Identify a hardware vendor from a MAC address. Common vendors bundled offline.