This sounds like you're referring to a search query or a title for a guide that promises Super Mario 64 playable in a browser under the labels:
(jump three times in a row while running). To cover long distances, use the (run, hold to crouch, and immediately press Warp Points super mario 64 unblocked games no flash top
Nintendo aggressively pursues DMCA takedowns against unblocked sites. While playing a browser port is unlikely to get you in trouble, the sites themselves often disappear. The reverse-engineered port is legal in many jurisdictions (clean-room reverse engineering), but Nintendo's IP (characters, music, level design) is not. This is why you'll see fan games using original code but original assets – a legal gray zone. This sounds like you're referring to a search
Clear Your Cache: If the game feels laggy, clearing your browser cache or closing extra tabs can help free up the RAM needed for the emulator. HTML5 Games: Many game developers have moved to
The most popular way to play is through web-based emulators. Developers have ported the original Nintendo 64 engine to run directly in the browser.
The Short Answer: You can play Super Mario 64 in a web browser without Flash or downloads because the game has been ported to WebAssembly (Wasm) and WebGL. This is not an emulator running Flash; it's a native recompilation of the original 1996 Nintendo 64 source code (from the 2020 "SM64 PC Port") into JavaScript/WebAssembly.