The latest articles on DEV Community by Koray KÖYLÜ (@kamazaki). https://dev.to/kamazaki https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3956907%2F80823184-cbee-44c9-bcfe-47885d08653b.jpg https://dev.to/kamazaki en Koray KÖYLÜ Thu, 28 May 2026 15:39:14 +0000 https://dev.to/kamazaki/i-built-a-what-is-my-ip-site-because-i-was-tired-of-the-ugly-ones-263j https://dev.to/kamazaki/i-built-a-what-is-my-ip-site-because-i-was-tired-of-the-ugly-ones-263j <p>I use "what is my IP" sites maybe once a month. Every time I end up on something covered in ads, calling three different tracking APIs, and showing me results I don't fully understand. So I spent a weekend building whatsmy.fyi.</p> <p>The thing I didn't expect: you don't need an IP geolocation API at all if you're on Cloudflare Workers. Every request comes with a <code>cf</code> object that already has your city, country, ISP, TLS version, HTTP protocol, and RTT. Free. Zero latency.</p> <p>The part I enjoyed most was the WebRTC leak test. It checks whether your browser is exposing your real IP through RTCPeerConnection even when you're on a VPN. I ran it on my own setup. It was leaking.</p> <p>Zero logs. Zero storage. Just your data, shown to you.</p> <p><a href="https://whatsmy.fyi" rel="noopener noreferrer">https://whatsmy.fyi</a></p> webdev showdev cloudflare privacy