How to play retro games in your browser
The fast way to play NES, SNES, Genesis, GBA, and more — all in a browser tab.
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Guides
Tutorials, FAQs, and reference material for in-browser retro game emulation.
What is EmulatorJS? An emulation engine, explained
The open-source JavaScript bridge that turns libretro cores into browser-runnable WebAssembly.
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Save state vs save file: what’s the difference?
Save states freeze RAM. Save files mirror the cartridge battery. They behave differently — here’s the cheat sheet.
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Is retro game emulation legal? A plain-English guide
Emulators are legal. ROMs are the gray area. Here’s how to think about it without the legalese.
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Best controllers for browser-based retro emulation
Picks across budgets — wireless 8BitDo, wired Hori, and the cheapest credible Xbox-style options.
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Best Bluetooth controller emulator picks for 2026
Six Bluetooth gamepads tested in-browser: latency, mapping, and who each suits.
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Controller not working in emulator? Fix it in 5 minutes
Step-by-step fixes when your gamepad goes undetected in a browser emulator.
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Emulator save lost: can you recover your progress?
IndexedDB saves vanish easily. Here's what happened and what you can actually do.
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How to play Sega Genesis online — Mega Drive in your browser
Run Mega Drive games in your browser — no download, no install required.
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