Browser-based crypto mining in 2025: Still viable or virtually dead?

Browser-based crypto mining is making a quiet return in 2025, offering a low-barrier way to earn crypto, but its profitability and impact remain limited.

Browser-based crypto mining sounds like a dream: Just open a webpage, let it run, and your computer starts earning crypto in the background. No bulky ASICs, no GPU farms, no long setup tutorials — just your browser doing the heavy lifting.

The idea blew up in the late 2010s with tools like Coinhive, which let website owners mine Monero (XMR) using JavaScript. At first, it seemed like a clever alternative to ads; visitors donated a bit of unused CPU power, and websites earned crypto. 

But then came cryptojacking. Sites began running these scripts without user permission, draining resources and slowing down devices. In 2019, Coinhive shut down, citing shrinking returns and mounting scrutiny.

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