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: https://seowebsiterank.com/tech/built-with/OpenGSE

  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: 'seowebsiterank.com',cType: 'managed',cRay: '9816f521e9978c6b',cH: 'kya2YJojaZYjApHfT6xzWUb5M4cq1IwYNkdhFuUFnAI-1758262620-1.2.1.1-5GADfSyFchEtgFjRELUBYlvsKNU3n20VaGHnpSEQxtsdpXao2Ll1tiLt6AEPFwBA',cUPMDTk:"\/tech\/built-with\/OpenGSE?__cf_chl_tk=F7N3q_UiFb1Z6WSl3LmIcewIZlW8iIgODB9DW0nf99k-1758262620-1.0.1.1-d5QX0QSUjVECMymHE_1uZ5vzbllzyAQDMOYWdvJXWz0",cFPWv: 'g',cITimeS: '1758262620',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/tech\/built-with\/OpenGSE?__cf_chl_f_tk=F7N3q_UiFb1Z6WSl3LmIcewIZlW8iIgODB9DW0nf99k-1758262620-1.0.1.1-d5QX0QSUjVECMymHE_1uZ5vzbllzyAQDMOYWdvJXWz0",md: 'ttLq0mOjTRJJEbmIKZwAhc65zkzS7a64wiGrUzG8j7s-1758262620-1.2.1.1-twD36JVt9AU2ybB7GkdwsPebdpkbae1AerRYUBoVniMW27A.pG8vvM.DoOiK9PgvjQ48VMz6m3dnHvu4VnpGSxKzsfx61IKNNDAPkKSeqp0KH1m4KX9FsJSloe6vdMV5nRuqdjl_5nSZniJt_7Y14RZtn0vkyHmrZhLqhscT5nx8lFIQ9dZUrrVWKhMExEu2Xw61mqO1hFv3tumAlNwQ2Ik9PIBYcDa6TAlPdZ4N8qXA.s2oaE.F7tI3NiGAb4Kc0zz6WdXqZxZXjGeaJ1b6OsucGaBSZzW.xO4Kxr4jBSV6RW7mcB2mo2DXruSMmzDXiJ2sHmLVkK7cT5rIfwUaaym7ig0cU7bK6nWKwbm6IrNA55V1E0x5Um27NFbzm.9J7E97WtZvAONsgl693pKlkKd8TYfbTiZcJH1Is4922qIWtQwPgeYhgAQs.Hoxe3o8tmekA14spaCe2mhvEpi0N9aHDXq.R09Z7hk7pvB3mJwyfRmqxe3gbMVgb.10xMrZExgVQPgzKY4mi0v8RQFTgrMhDQlIgUouv3oIJlwE0sTpjdPXWSRG9aKRsq3J1_qzHaFfspxX9tDGUMNtLpC0vOB80COdQcOsPOeCBMfmt19Pa_JSDoJ3W3V.uYPeYVn_DX4On5UjJ79A9UptFzhSP_FzhRSVrzRtM_h_ZNEri6pUxxWcQEOMtK0b15Djvq.bfznYpZQFx7EQYyZEfwWbFjjCut8kEgKG3ndRoh6TnrsDypLNMB7CNJIR.bfUximYxOJip8QZYE2ik5fwbBFf9cUWC2gQ00mkseedewnSHs6NWknBBLyQ6uSML4iSFs.DcqIyBht4l6ByEeMfOlzPtw',mdrd: 'kgkz__uIY8axgLIdavYbtT22cax1l5mLHTsEH0P_.X0-1758262620-1.2.1.1-iLRQfk5PLYYY5Tur56nYnolBE2Cf_KEbEQucljsHfjL1Db6yalcwbDxyUsnSMMKb9goXbsNr8o3Ah1cWZOV9iBW52woERRlH4qinljt7j8FlHIbrR5lBKJXJvhA4ud8Z8FgqOgANduByCQIEqPLeBU.9r0vL2.Lv9nhMDay7RCTrYZuDRVWe9nv69fsoBdOE24ICnYwbTGlxaYfmakJRmCQ35.mkGmHt8KgA348ChfUKRiGYbO5dvkBMy7rTMIh9bfmtpb6EpwSkTS5Nb9f30z3fbUzjoqhcOGFPx0iUFGXl3FYNR2re0kb1_bOSfCVgCoyn__UQudLqTecO7S.Mg8Tsm7djGfRFAPW5gRDqdHMeQklRu7P_npDY6QCrxqhDyjleHJu6j6AtYuBsONE4k.qfkeiKt5Sm.3tzhOfNEFS3e6nqCVJufZCAjfcoWqSvxp4edjk_sdp91hPYjBBxtD4DIeHohkoBZ8cebAnGueRr4AiURmrDNSeWw9CzpMCOBglOvoLX35Lr0wquEWJcAzP_.HXkv7jIcO9SvYRQz0iR0fOU5Jheay7cWjqzWXPHs9p6Tv5TgJdRq4tiUdZV_N8Vkk9Hq3X75yJqG0MvZEUKtluc.c2yImmngG8gT8spMCOP.6FdQQUiPpe7Ol_Ryb4vRLlpfHB0ZQlVHI7L1X5dkOuAlOsVzgpjDVlv9lXuh7eghevl.OlazsJNaFmbf8j0y6q.r4Y6AcIaskDu570EycbQvt1qjbpy5cniD1S2gHJvWiJdhm1CZbzI3d6JxbL9AhDBBmdZ.K_Y81J64WXb.UwVpV5yJq3PyECjNmG6JamG.K8ZLt05la0RNuknV0AUkkZVkNTO8vRavFs50DJ8s8yDGo2cyyW9mrIEV_PdtwZoByP1m71BIWkfz5YnC9QKeP1iyyUc7gUuI1F49.sUS5Uqbqr5dpmxgypHdlbke3L6xNce9AxUJUQHUM75Hr9AgHw9Njni35F2otjfw5g28Go3u.DBYBSyJPZz9TAJmLlj9OjN2.vswYdHsIsLdihWzDbAOIVt1VYFzSRYhiUcK7zLsHPzlPrPz8gzsVXru1lBlWMJ2kVSqu540nspqbV2xalJjzX4GMmZ14mXWTEskqoveB5f02uOiB3szvlFDGw6ulwc_1zG3fjX9BR7Vwq8rMdAg2ZES1hxg.Z0RzV9xfndIZCjCGxR1hbu4aNbFXqlDK79a7i1gf3RqcU63ZwJoNoWPamHTbw7xj2ffSmbO0ILMJjBnmTZRejhhQjzyTAfcCq7.SPyOKAlKXzoP03z3YWp3ESxQlp3BiCODijAANfKnifbbgmJ4Jnzudm565wsmNxbG0MwInGCplPhtpSIkDNB0tZoCd8PQtH0MDuxRfy4PYD6KGZEQTcv3VUvsIGg8k4dlDV8ZDUSQV16atPp.XVs6KoDBFx57JOEIo.FQs8lIfmp_.brwsJpf19Pg_AeXBDxBya0N1C9LVVc5cLZ_8WEnuNeJQbB64cwDfAi5r8b9mmBHJtzH5mjBuF4fcJOrSgxrr7aT9qucnJEpte1DXCenU6Ddh7ofKpKxsPftzVpR3boHqJ9iR6Dwij.UB9jtdEjVDByoegVw5pLTUviTvlY7zfKX_VX2.WlR9Vp7UoTLzidir8UitZOuRjz.leojFtmw2FjA1UYGxMVjxxA6IKGRZqKFm18HjZ7IhvogZm_34oHtg0IwK4BV.aFlb4.lzzVaS6sdOqZQwEr4LvAr4WZjoNE.4mRxhlFA8oLn8NHXTHEyNEfEE2A_8NIowxqoiywVtFlf2di5jF9dBDJBVTM9P2u8EsZv83uDtP8LAKrfmybpl3cau.zYrIZ1iqbih.kB4qZAUTy3b9.2ndbf.ZMg4X1eLYbiPBdREDiD9mLKaCws430S9VF_UGmFsyoreUyGAAekbERcRbBsA',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9816f521e9978c6b';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,"\/tech\/built-with\/OpenGSE?__cf_chl_rt_tk=F7N3q_UiFb1Z6WSl3LmIcewIZlW8iIgODB9DW0nf99k-1758262620-1.0.1.1-d5QX0QSUjVECMymHE_1uZ5vzbllzyAQDMOYWdvJXWz0"+ 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