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ikawka/cloudflare-trace.js

Last active February 25, 2026 19:22
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Trace current user's location via javascript with CloudFlare provided the /cdn-cgi/trace is enabled.
Raw
cloudflare-trace.js
(function($){
$(function(){
$.ajax({
contentType: 'application/text; charset=utf-8',
crossBrowser: true,
type: 'GET',
url: '/cdn-cgi/trace',
}).done(function(d){
var data = d.replace(/[\r\n]+/g, '","').replace(/\=+/g, '":"');
data = '{"' + data.slice(0, data.lastIndexOf('","')) + '"}';
var jsondata = $.parseJSON(data);
console.log(jsondata.loc);
});
});
})(jQuery);
@marcelovani
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marcelovani commented Jul 12, 2021

I don't think CORS will be an issue on GET requests

@fawazahmed0
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fawazahmed0 commented Aug 17, 2021

Convert Return Format to JSON

@MaheshCasiraghi
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MaheshCasiraghi commented Sep 30, 2022 •
edited
Loading

Updated (September 2022):

async function getCloudflareJSON(){
let data = await fetch('https://1.1.1.1/cdn-cgi/trace').then(res=>res.text())
let arr = data.trim().split('\n').map(e=>e.split('='))
return Object.fromEntries(arr)
}

getCloudflareJSON().then(console.log)

@consatan
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consatan commented Nov 21, 2022

use https://cf-ns.com/cdn-cgi/trace in China

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