Back in August 2011, Nintendo released Internet Browser for Nintendo 3DS in a software update. This allowed users to browse Internet. it supports HTML, CSS, JavaScript and some HTML5 content but did not support Flash content.
Most websites rendered correctly in 2011, but today, due to the complexity of websites, pages may not render correctly. Due to its small amount of RAM (128 MB), very large pages may not fully load. Fortunately, there are no ads on most pages because of memory limitations. And unfortunately, many pages, including Wikipedia, produce an error 012-1004 "SSL connection failed" message.
Internet Browser was unaffected by 3DS & Wii U eShop closure in late March 2023.