Simulate an ad click or paste your URL with tracking params. Instantly check GCLID capture, UTM persistence, localStorage state, and form field population — then grab a ready-to-deploy script for your platform.
getElementById() — silently fails on Marketo (no id attribute on hidden fields). This version uses querySelector('[name=…]') and is confirmed working.// Salesforce GCLID Capture — querySelector version (Marketo compatible) // GTM: Tags → Custom HTML → Trigger: All Page Views // STEP 1: Find field names: DevTools console on your form page: // Array.from(document.querySelectorAll('input[type=hidden]')) // .forEach(i => console.log('name:', i.name, '| id:', i.id)) // STEP 2: Update GCLID_FIELDS below (function() { var GCLID_FIELDS = [ 'Gclid__c', // primary field — UPDATE this 'btURLGclid', // secondary — remove if not needed ]; var EXPIRY = 90 * 24 * 60 * 60 * 1000; function run() { var gclid = (RegExp('[?&]gclid=([^&]*)').exec(location.search)||[])[1]; var src = (RegExp('[?&]gclsrc=([^&]*)').exec(location.search)||[])[1]; gclid = gclid && decodeURIComponent(gclid.replace(/\+/g,' ')); if (gclid && (!src || src.indexOf('aw') !== -1)) { try { localStorage.setItem('gclid', JSON.stringify({value:gclid, expiryDate:Date.now()+EXPIRY})); } catch(e){} } var rec = null; try { rec = JSON.parse(localStorage.getItem('gclid')); } catch(e){} if (!rec || Date.now() > rec.expiryDate) return; GCLID_FIELDS.forEach(function(name) { var el = document.querySelector('[name="'+name+'"]'); if (el) el.value = rec.value; }); } window.addEventListener('load', run); })();
// HubSpot GCLID + UTM — multi-page journey support // GTM: Tags → Custom HTML → Trigger: All Page Views // UPDATE: FIELD_MAP values = HubSpot contact property internal names (function() { var EXP = 90 * 24 * 60 * 60 * 1000; var FIELD_MAP = { 'gclid': 'gclid__c', 'utm_source': 'utm_source__c', 'utm_medium': 'utm_medium__c', 'utm_campaign': 'utm_campaign__c', 'utm_content': 'utm_content__c', }; function sv(k,v){ if(v) try{localStorage.setItem('hs_'+k,JSON.stringify({v,exp:Date.now()+EXP}));}catch(e){} } function lv(k){ try{var d=JSON.parse(localStorage.getItem('hs_'+k)); return d&&Date.now()<d.exp?d.v:null;}catch(e){return null;} } function cap(){ Object.keys(FIELD_MAP).forEach(function(p){ var m=RegExp('[?&]'+p+'=([^&]*)').exec(location.search); if(m) sv(p,decodeURIComponent(m[1].replace(/\+/g,' '))); }); } function fill(){ Object.keys(FIELD_MAP).forEach(function(p){ var v=lv(p), el=document.querySelector('[name="'+FIELD_MAP[p]+'"]')||document.querySelector('[name="'+p+'"]'); if(el&&v)el.value=v; }); } window.addEventListener('message',function(e){if(e.data&&e.data.type==='hsFormCallback'&&e.data.eventName==='onFormReady')setTimeout(fill,100);}); window.addEventListener('load',function(){ cap(); fill(); }); })();
// WordPress GCLID + UTM — all major form plugins // Includes plugin hooks + MutationObserver for AJAX/modal forms // GTM: Tags → Custom HTML → Trigger: All Page Views (function() { var EXP=90*24*60*60*1000, NS='wp_'; function sv(k,v){if(v)localStorage.setItem(NS+k,JSON.stringify({v,exp:Date.now()+EXP}));} function gv(k){try{var d=JSON.parse(localStorage.getItem(NS+k));return d&&Date.now()<d.exp?d.v:null;}catch(e){return null;}} function fi(s,v){if(v)document.querySelectorAll(s).forEach(function(e){e.value=v;});} function cap(){ ['gclid','utm_source','utm_medium','utm_campaign','utm_content','utm_term'] .forEach(function(p){var m=RegExp('[?&]'+p+'=([^&]*)').exec(location.search);if(m)sv(p,decodeURIComponent(m[1].replace(/\+/g,' ')));}); } function fill(){ fi('[name*="gclid"],[name*="GCLID"],[id*="gclid"],[name="google_click_id"]',gv('gclid')); fi('[name*="utm_source"],[name*="UTM_Source"]',gv('utm_source')); fi('[name*="utm_medium"],[name*="UTM_Medium"]',gv('utm_medium')); fi('[name*="utm_campaign"],[name*="UTM_Campaign"]',gv('utm_campaign')); } document.addEventListener('gform_post_render',fill); // Gravity Forms document.addEventListener('wpcf7mailsent',fill); // CF7 document.addEventListener('wpformsAjaxSubmitSuccess',fill); // WPForms document.addEventListener('elementor/popup/show',fill); // Elementor if(window.MutationObserver){var t; new MutationObserver(function(ms){ if(ms.some(function(m){return Array.from(m.addedNodes).some(function(n){return n.querySelector&&n.querySelector('input');});})) {clearTimeout(t);t=setTimeout(fill,150);} }).observe(document.body,{childList:true,subtree:true});} window.addEventListener('load',function(){cap();fill();}); })();
// Shopify GCLID + UTM // Deploy: GTM or paste before </body> in theme.liquid // Appends tracking params to checkout/cart links (function(){ var EXP=90*24*60*60*1000,NS='shp_',P=['gclid','utm_source','utm_medium','utm_campaign']; function sv(k,v){try{localStorage.setItem(NS+k,JSON.stringify({v,exp:Date.now()+EXP}));}catch(e){}} function gv(k){try{var d=JSON.parse(localStorage.getItem(NS+k));return d&&Date.now()<d.exp?d.v:null;}catch(e){return null;}} function cap(){P.forEach(function(p){var m=RegExp('[?&]'+p+'=([^&]*)').exec(location.search);if(m)sv(p,decodeURIComponent(m[1]));});} function app(){ var parts=[];P.forEach(function(p){var v=gv(p);if(v)parts.push(p+'='+encodeURIComponent(v));}); if(!parts.length)return; var qs=parts.join('&'); document.querySelectorAll('a[href*="/checkout"],a[href*="/cart"]').forEach(function(a){ if(a.href&&!a.href.includes('gclid')) a.href+=(a.href.includes('?')?'&':'?')+qs; }); } if(window.MutationObserver)new MutationObserver(app).observe(document.body,{childList:true,subtree:true}); window.addEventListener('load',function(){cap();app();}); })();
window.AdTrackDiag.dump() for console debugging.// Universal Ad Tracking — any platform, any form // GTM: Tags → Custom HTML → Trigger: All Page Views (function(){ var EXP=90*24*60*60*1000,NS='_adt_'; function gp(p){var m=RegExp('[?&]'+p+'=([^&]*)').exec(location.search);return m?decodeURIComponent(m[1].replace(/\+/g,' ')):null;} function sv(k,v){if(v)try{localStorage.setItem(NS+k,JSON.stringify({v,exp:Date.now()+EXP}));}catch(e){}} function lv(k){try{var d=JSON.parse(localStorage.getItem(NS+k));return d&&Date.now()<d.exp?d.v:null;}catch(e){return null;}} function fi(s,v){if(!v)return;document.querySelectorAll(s).forEach(function(e){e.value=v;});} function run(){ ['gclid','msclkid','fbclid','li_fat_id','utm_source','utm_medium','utm_campaign','utm_content','utm_term'] .forEach(function(p){sv(p,gp(p));}); fi('[name*="gclid"],[name*="GCLID"],[name*="Gclid"],[id*="gclid"],[name="Gclid__c"],[name="gclid__c"],[name="btURLGclid"],[name="google_click_id"]',lv('gclid')); fi('[name*="msclkid"],[id*="msclkid"]',lv('msclkid')); ['utm_source','utm_medium','utm_campaign','utm_content','utm_term'].forEach(function(p){fi('[name*="'+p+'"]',lv(p));}); } if(window.MutationObserver){var t;new MutationObserver(function(ms){ if(ms.some(function(m){return Array.from(m.addedNodes).some(function(n){return n.querySelector&&n.querySelector('input');});})) {clearTimeout(t);t=setTimeout(run,150);} }).observe(document.body,{childList:true,subtree:true});} window.addEventListener('load',run); window.AdTrackDiag={ dump:function(){['gclid','msclkid','utm_source','utm_medium','utm_campaign'].forEach(function(k){console.log((lv(k)?'✓':'○'),k+':',lv(k)||'not stored');});}, simulate:function(g){var f=g||'TEST_'+Math.random().toString(36).substr(2,9).toUpperCase();sv('gclid',f);sv('utm_source','google');sv('utm_medium','cpc');run();console.log('Simulated:',f);} }; })();
['gclid','utm_source','utm_medium','utm_campaign','utm_content','utm_term'].forEach(p => {
const url = new URLSearchParams(location.search).get(p);
const ls = ['','_adt_','hs_','wp_','shp_'].reduce((a,ns) => {
if (a) return a;
try { const d=JSON.parse(localStorage.getItem(ns+p)); return d?.v||d?.value||null; } catch(e){return null;}
}, null);
console.log((url||ls?'✓':'✗'), p+':', url?`URL:${url}`:ls?`LS:${ls}`:'NOT FOUND');
});
Array.from(document.querySelectorAll('input[type=hidden]'))
.map(i=>({name:i.name||'(none)',id:i.id||'(none)',value:i.value||'(empty)'}))
.forEach((i,n)=>console.log('['+n+']',JSON.stringify(i)));
const fake='TEST_'+Math.random().toString(36).substr(2,9).toUpperCase();
const exp=Date.now()+90*24*60*60*1000;
['','_adt_','hs_','wp_','shp_'].forEach(ns=>
localStorage.setItem(ns+'gclid',JSON.stringify(ns===''?{value:fake,expiryDate:exp}:{v:fake,exp}))
);
console.log('✓ Stored:', fake);
const r=Object.keys(localStorage).filter(k=>/gclid|utm_|_adt_|hs_|wp_|shp_|msclkid|fbclid/i.test(k));
r.forEach(k=>localStorage.removeItem(k));
console.log('Cleared',r.length,'keys:',r);
<input> on the page — shows name, id, and current value