It looks like this is a web page, not a feed. I looked for a feed associated with this page, but couldn't find one. Please enter the address of your feed to validate.

Source: http://ask.metafilter.com/rss.xml

  1. <!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'ask.metafilter.com',cType: 'managed',cRay: '95f38a5f5829c5b2',cH: 'jTPVudReSIgIDcwm0XGbf3V4TX1vRTZ1DUygqvuvBz4-1752522536-1.2.1.1-CINDrkCz2lSgDQhYJTbLl1H76W5q4thKn9EnD4t8PbzMcD1S0UUMo3h_O5ePI4yE',cUPMDTk:"/rss.xml?__cf_chl_tk=tLwwvhAqR80BtZT8DqGWQlRrfajgkelfJbUoeEqK6Gs-1752522536-1.0.1.1-RT4p_Qz8l8v1xsggQ64wtg5eM5A6SOPZJ4CoAhLOz_o",cFPWv: 'g',cITimeS: '1752522536',cTplC:0,cTplV:5,cTplB: 'cf',fa:"/rss.xml?__cf_chl_f_tk=tLwwvhAqR80BtZT8DqGWQlRrfajgkelfJbUoeEqK6Gs-1752522536-1.0.1.1-RT4p_Qz8l8v1xsggQ64wtg5eM5A6SOPZJ4CoAhLOz_o",md: 'FNBp7nYJc4q3Q53YehZNr.kjoYvOp2Kf3zrw8BPHJQs-1752522536-1.2.1.1-iL.ZEgKrTZhvUCXwDFjRrShySnlOfeDQgFJTVZwrrIXaZkmaY8SUABNzo4ndj0c6I09eHylbJRpJnJPSp_E8wdWpHueGJduAQgUVL.At.mk1yhn6xNHP8obzW3biho1Tnv9Et9fUfcWTkGQiLqAce4llOiOuNIFWOjinlCRg3GbWMho0jQLt92T.aOIcVklQYfJGOvp4X2CUx5VuCI8MrjdsEnnhYQLF9NR7bluJ6so6N_jAGVdmOJ.Ntr6B9wFMAyy3Zp37bP1AoMJgRYtn.BqKcraI7z.8kr799QYwWuo0Am8xgHuIjwXyi.LO7MiHxroNoIvh8Nd4OzXblkGnSJArNZwZX7JO4kOsp.gK0cXkM_wEg_tWsFkMRREUT5ioXbKe2F9pnLRys1K9w5PF_Bc8aklOAXdyYrCP7s8RF7kCv2GkcTIetp9CNh9K1wCQuCnuCa8ObfScdz9dWu8nt6RgQG4ITD7HFLtiMoycQJyok6Y1PiFUZi9u1vmJvV229k5Stt_bQ9pVQ1xuC92LBdM8MTFeECT7dpMbfym75bieAefFRyjcrwFipz2qp8WbL6pKvSFk_pMzhkpI.dYTZ9Yp7XzRTvfXhnP4tqZGAtUAbTZf_bmmZtn7GBnTUqae0Y5bp4xgWQhxQYSHTeWQK8HBcF._6.de5_jTfUQSR4B6Z4B_wtWzqurZj..Z4BP2ROiEF7m1IxB2.bsFubwl43B.5d.e_plT0ijlkXoJrpaMn5pqt51qwCTTty8VIUG0PujaUo2N3U3iYBze3l6Jkvc0ai0_xAwcP7u417WZCp3P0A.kLb_M.k3ndVIRp.D4rMhw.5OReiDnp5K8lmqqdDagvGqreRngDszna7jHL8lMLrcTPPRKqEJK5cMNPe4ZRwIki3F7WoUL635K615n5qncCIaqj0M5Yf_whMvpJZ82oAL7WAeE4HABsUV6rASwHsA9wA1IxSDPKd.D4r2ZUkHEBKvCqJB2c_9_q9AU1XN0FqsFPxdtZOzhCGFzzY8a',mdrd: '',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=95f38a5f5829c5b2';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null,"/rss.xml?__cf_chl_rt_tk=tLwwvhAqR80BtZT8DqGWQlRrfajgkelfJbUoeEqK6Gs-1752522536-1.0.1.1-RT4p_Qz8l8v1xsggQ64wtg5eM5A6SOPZJ4CoAhLOz_o"+ window._cf_chl_opt.cOgUHash);a.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(a);}());</script></body></html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda