<span lang="EN-GB">The present article is concerned with identifying the linguistic and extralinguistic features of </span><em><span lang="EN-US">Instagram, Twitter, </span></em><span lang="EN-US">and</span><em><span lang="EN-US"> Live Journal</span></em><span lang="EN-GB"> hypertexts, depending on their functional focus. The relevance of the topic is due to the need for a more detailed study of Internet communication from the point of view of functional and stylistic aspects. </span><span lang="EN-US">The study provides a comparative analysis of <em>Instagram, Twitter,</em> and <em>Live Journal</em> online services based on the Russian language material.</span><span lang="EN-GB"> The results are correlated with the questionnaire data on the studied problem. The article discusses graphic, lexical, stylistic, syntactic, and spelling features. The authors conducted a comparative analysis of the hypertexts of <em>Instagram, Twitter,</em> and <em>Live Journal</em> online services in the context of their functions; identified linguistic and extralinguistic features of the hypertext of the services under study; established the relationship between the language of the text and the function implemented. </span><span lang="EN-US">It has been established that all three online services perform, first of all, a communicative function, which is expressed through the use of slang, vernacular, online discourse vocabulary, graphic means, markers of increased emotionality, recreation of a specific accent/dialect, spelling and punctuation violations, incomplete, unextended sentences. Along with the socialization function, <em>Instagram</em> performs the function of self-presentation, for the implementation of which the authors of publications resort to linguistic creativity. Unlike <em>Instagram, Twitter,</em> and <em>Live Journal</em> fulfill a more political function, expressed in stylistic devices such as metaphor, comparison, irony, hyperbole, and repetition. </span><span lang="EN-GB">The results were verified using a questionnaire survey conducted among Russian students</span><span lang="EN-US">.</span>