I'm looking for free cryptocurrency mining sites and found these 8 options worth checking out. I started testing some and wanted to share what I discovered.

Awesome Miner has been a classic since 2014, working well on Windows and Linux. Very easy to use, just download and start. Then there's BetterHash, which runs on Windows and automatically lets you choose between BTC, ETH, and ETC. The cool thing is that the system selects the most profitable coin for you.

StormGain is quite popular here in Brazil, especially for those focusing on Bitcoin. The advantage is that it runs even on mobile phones and doesn't consume much energy. It has content in Portuguese, which makes it very convenient.

CryptoTab is another one I like — it's a browser you install that starts mining while you browse. It works on Windows, Mac, Android, and iOS. It also has an invitation system that multiplies earnings.

Kryptex is interesting if you have a Windows PC — they say you can earn up to R$520 per month. PEGAPool is focused on ETH via mobile, promising up to 0.01 ETH per day.

MinerGate is quite versatile, runs on various systems, and automatically selects which coin to mine based on your hardware. ECOS has been around for a while but isn't completely free — it offers a trial period.

Bonus: there's EarnCrypto too, which is more about earning cryptocurrencies by doing simple tasks like watching ads and surveys. It's not real mining, but it earns some satoshis.

Look, there are quite a few sites offering free cryptocurrency mining, but be careful of scams. Always verify the legitimacy, check if they have a legal history, and what security measures they use. Don't fall for overly exaggerated offers of free Bitcoin asking for your data — that's a trap.