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://online-tutor.ru

  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: '101poisk.ru',cType: 'interactive',cRay: '95aafd316c0881ee',cH: 'DUcqfKPtvU5hjwWtiLJc4ljCzNROgX.tVEujG8.g5kw-1751761779-1.2.1.1-Qy_K8hIB9Syugf_WuIBZSxuQE6_tsfHTUZO1fmgJKutFOoefn7ekMc8yb1pu0BZ8',cUPMDTk:"/collection/sajty-poiska-repetitorov?__cf_chl_tk=7l3tLVnQAzQXQ5JeQ238Hs7ezLfnRz9C.2Y1bZoEg1Q-1751761779-1.0.1.1-JuLauMvAScy.mC6dZDd7gQnMdsiPI_OCP2rfpEZmJZg",cFPWv: 'b',cITimeS: '1751761779',cTplC:0,cTplV:5,cTplB: 'cf',fa:"/collection/sajty-poiska-repetitorov?__cf_chl_f_tk=7l3tLVnQAzQXQ5JeQ238Hs7ezLfnRz9C.2Y1bZoEg1Q-1751761779-1.0.1.1-JuLauMvAScy.mC6dZDd7gQnMdsiPI_OCP2rfpEZmJZg",md: 'HBJ8_IP7.JG8riBQdDCgc0S4KCoh.P6EtvWB8PviEBk-1751761779-1.2.1.1-B1r.1502X_LAHQtvASR_kUT4FWw2z1a_M8m6fCll32NhtLJa5aGhDcPi4JEX7orZCMUqUvyuvdeaCwbS7H.SmhmccGxEWX1h_o3A8Za4oWfQCUvuL3INuZuncLMW3o6LcIZv1kYES92OMPJH5EhBvlZcwFwwyeG._XOQFBCkaboWLO1pY46E57ZANMlnziqU5l_Q.Q1WH1OP6AkJij0NSagT1Ceit1_FAsVOSu707n7WH8WoaKxE3Us8jZ6aX7_fvYC0fvwD3_La3UUacyXt6k1o.Fbk1UkFg_xnCELI2atfGmTPEPj0KFopJMoETJwU4EQAagz54gCpuwhuiT8zqgE6G.cn7OC6sE3IohL0BXVf8dmklGXBLyyD1ysT8iERZGqYeRbCjdhVsjIutTmw7GHP.P6PMbRl_FLPAscL_8Lo_GQqgy0MNXMpOGtMYwKcwtzIf47odN5O.0DhAsGXsbFcVrNcUB0NTvNM4YIeraURIkS_BDqo3mhLWudWgGrk8S1BnKjCkDXrXQGcgEZ01ZwnHZ98vsirCvpe9LTxMuyVdf6.QUW6027V6lbCj_PmjWVRAS8H1rbJz8ifrIAfV0xV09K0v3oW1gr2urzNEyMI9MUeAyiICCLT.mXHCiI6qsXj7mmFWTSMWBckC65MPIkStHxY.jjyWYsTF2ieGYzLw86zHKc.VQGSaqxfA3qAZRdA3Jl7DGYqHa8Ub9ZluyPauyfI5zW_EYk8RM5ARo7FzmY6JLX6Y0HXLWb9fxNa3Md1S7Il1jMOJycGF9CWLgGQdQyxPH9OnrNBr.8X0.a6sVVrsomN6MHu4MiahgjJgMUSS5co56qCgIsDlQRVYSHdV7bjvjJFuVdz7n0azmR2wpr5ltOw9hj1HFXiINBJpD1rQu2MsdltO18DWqXteDvItlCQ.yYtFSjJL9b1WuYWPQrLnyK0vzpdg_ff3L8bwMiNU1MRInMRbjI2sbqMK0NMlZ5W3bJbPtkx3rFR1.RfEl2vBJ76Lpm4Rlx76nXfGEucVgJEDLEu.gNxqrtd0TDfFBU229UsPQ0BJnKzmYpP70bmurjorv7nCpZp_U7oCImDM1YxQM7wr5gDglsa2FWw3I61jukuyd6k_fOHm8U',mdrd: '',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=95aafd316c0881ee';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,"/collection/sajty-poiska-repetitorov?__cf_chl_rt_tk=7l3tLVnQAzQXQ5JeQ238Hs7ezLfnRz9C.2Y1bZoEg1Q-1751761779-1.0.1.1-JuLauMvAScy.mC6dZDd7gQnMdsiPI_OCP2rfpEZmJZg"+ 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