Are HTML5 tags case sensitive ? Last Updated : 27 Jan, 2022 Comments Improve Suggest changes Like Article Like Report In this article, we will discuss the overview of case sensitivity in HTML5. We will see the example related to it for more understanding. All the HTML elements/tags are case-insensitive. Case-insensitive means the tags/elements which are used in the code are understandable by the browser irrespective of the letters being the upper case or lower case classes. Note: It is recommended to use all tags in lowercase or uppercase for best practice and better understanding. Example 1: This example contains all the tags in lowercase. HTML <!DOCTYPE html> <html> <body> <h2>Welcome To GFG</h2> <p>Geeks for Geeks</p> <p>The code has lowercase body tags</p> </body> </html> Output: Example 2: This example contains some tags with both uppercase and lowercase alphabets. This example has <boDY> tag which has a combination of both upper and lowercase alphabets, but still, it does not affect the output. HTML <!DOCTYPE html> <html> <boDy> <h2>Welcome To GFG</h2> <p>Geeks for Geeks</p> <p>The code has both upper and lowercase tags.</p> </boDy> </html> Output: Note: You can see that both the above code snippets generate the same output. Example 3: We used multiple tags in mixed case but we have still reached to the desired output. Tags used in mixed case in the below example are <HEAd>, </TitLe>, </heAd>, <BoDy>, <StrONg>, </STroNG>, <P>, </p>, </bR> and </HTmL>. HTML <!DOCTYPE html> <HTML> <HEAd> <Title>Welcome to GFG</TitLe> </heAd> <BoDy> <StrONg>Hello World!</STroNg> <p> This is an example of Case-insensitivity in HTML </bR>Observe the output </p> </body> </HTmL>  Output: Comment More infoAdvertise with us Next Article Are HTML5 tags case sensitive ? 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