UNDERSTAND THE EXPERIMENT
Yes, technically. No, it is not economically competitive with ASIC mining.
Your CPU can perform Bitcoin’s SHA-256d hashing. A browser can do real proof-of-work. The odds of finding a block on a PC are still extraordinarily small.
REAL WORK. A TINY CHANCE.
Bitcoin Web Miner runs hashing locally using WebAssembly and Web Workers, with live jobs from a solo pool through its backend. It is a free experiment, with no registration.
Try real Bitcoin mining in your browserNothing starts automatically. Choose your workers, then press Start.
Yes. A laptop can hash candidate Bitcoin block headers and send qualifying results through a compatible mining backend. A network-valid hash is a block candidate; it still needs a valid block and acceptance into the chain. Finding a pool share alone does not earn a solo block reward.
There is no reliable single number for every PC. CPU model, browser, worker count, power settings and temperature all matter. Use the local hash test, then enter your measured rate in the solo mining calculator. Results from other algorithms are not comparable to SHA-256d.
In this application, mining mode processes live Bitcoin mining jobs. The browser performs the hashes and the backend validates submitted work before forwarding it to the pool. The separate local hash test measures speed on a fixed header; it does not mine for rewards.
An ASIC is dedicated hardware built for one task. Bitcoin mining chips implement SHA-256 work in specialized circuits and run many attempts in parallel. A general-purpose CPU executes software, so it is many orders of magnitude behind purpose-built mining equipment.
Ordinary PC and laptop Bitcoin mining is not economically competitive with ASIC mining. Electricity and hardware wear are real costs, while the chance of a solo reward is extremely small. Treat this as a learning experiment or lottery mining, not an income plan.
No private key or seed phrase is needed. Never enter either. Mining uses only a public Bitcoin payout address, which is sent to the backend and pool and can reveal public blockchain activity.
You choose the number of CPU workers. Start low, watch heat and battery use, and press Stop to end hashing. Background tabs may be throttled or suspended by the browser.