Browser games as a genre started in the late 1990s with Java applets and the first wave of Flash content. Newgrounds launched in 1995, became a Flash hub by 2000, and became the dominant home for amateur browser games for the next fifteen years. The 2002–2014 stretch was the golden era — Albino Blacksheep, Kongregate (founded 2006), Armor Games, Miniclip — all running on Flash, all hosting thousands of games made by hobbyists who wanted to ship something quickly.
Then Flash died. Adobe announced the platform's discontinuation in 2017 and pulled the plug on December 31, 2020. Tens of thousands of browser games stopped working overnight. The Flashpoint preservation project (flashpointarchive.org) has since archived around 100,000 of them, but most casual players never recovered them.
The HTML5 era — running roughly from 2014 to today — replaced Flash with browser-native technology. Cookie Clicker (2013) was an early HTML5 hit. 2048 (2014), Slither.io (2016), Universal Paperclips (2017), and the .io games genre broadly all emerged in this window. The new platform is more capable, mobile-friendly, and more permanent — HTML5 isn't going to be deprecated by Adobe.
The current era adds two new wrinkles. First, The New York Times' acquisition of Wordle in 2022 effectively legitimized browser puzzles as a daily-use format; Connections, Spelling Bee, and the Mini Crossword now have larger combined audiences than most mobile gaming franchises. Second, AI-driven games like Quick, Draw! (2017) and the more recent generative-AI experiments are starting to become a real subcategory; we cover the best of these in our AI Image Generators category.
What ended up here, in this category, is everything that survived all those transitions and is still worth a tab.