Some toons, such as Marzipan's Answering Machine Version 17.2, Dangeresque Puppet Squad: The Hot Jones Hijack, Mr. On Janu( Trogday), an HTML version of the TROGDOR! game was released, and HTML text was added below the Index Page discussing alternatives to Flash, such as YouTube. At a PAX East panel in 2018, Matt explained that HTML5 files were larger than Flash files, so converting the website to HTML5 would cause a bandwidth issue.

In late 2017, on the Lost in the Stacks interview (entitled 'Homestar Runner, Gone in a Flash'), the Brothers Chaps discussed how they might update their website, such as exporting the toons to a different format, reprogramming the games, or running the website through a Flash emulator. Flash is Dead! humorously acknowledged this, remarking 'We gotta figure something out, fast!' and suggesting HTML5 may be the way forward for the website.

In 2015, major browsers such as Google Chrome and Firefox stated that they would be dropping native Flash Player support on their browsers in favor of the more modern and secure HTML5, and Adobe later announced that Flash Player would be discontinued at the end of 2020. Post-Flash Transition See main article: Post-Flash Site Update The FAQ would recommend that you get the latest version of Flash Player, version 32 at the time of its discontinuation. Most of the content on the site required version 6.0 of Flash Player to play, but some required version 7 (such as Stinkoman 20X6) and would recommend 8. Prior to December 31, 2020, the site was made up of embedded Flash files which could be played using the browser plugin Adobe Flash Player, which was included with most desktop web browsers at the time. This platform was also formerly known as 'Macromedia Flash' prior to Macromedia's acquisition by Adobe. 'Flash' may also refer to Adobe Flash, the multimedia platform that was used to produce and display the site's content. Flash has also made multiple appearances within the body of work, most notably used by The Cheat to create his Powered by The Cheat cartoons. Adobe Animate (formerly Adobe Flash Professional and Macromedia Flash), colloquially referred to as Flash, is the software used by the Brothers Chaps to create cartoons and games of Homestar Runner.

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