Does browser mining of Monero still work?

Yes, browser mining of Monero can still work in 2026, but it is usually slow and unlikely to earn enough to cover your costs. On a phone, tablet, or everyday laptop, treat it as a small experiment—not a practical income source—and check what the website is actually mining.

What “still works” means today

Browser mining means running mining software inside a web page. Mining uses your device’s processing power to help secure a cryptocurrency network and compete for rewards.

Monero switched to RandomX, its current mining algorithm, on November 30, 2019. An algorithm is the set of rules that defines the computing work miners must do. RandomX replaced the older CryptoNight variants used by many early browser-mining services.

That change matters. Old scripts and guides made for CryptoNight do not mine today’s Monero network.

A modern browser can run mining code using technologies such as WebAssembly, which lets a web page run compiled programs. But being able to run the code does not mean it will run efficiently—or that every site advertising “Monero browser mining” actually does so.

Why everyday devices struggle

RandomX favors CPUs, the main processors in computers. However, it is demanding enough that running it inside a browser puts you at a disadvantage compared with dedicated mining software.

For context, RandomX:

• Benefits from about 2 MB of L3 cache per mining thread. L3 cache is fast memory inside the processor; a thread is one stream of work.
• Uses a 2,080 MB dataset in fast mode, before other memory needs.
• Has a light mode with a 256 MB cache, but it runs much more slowly.

Phones and tablets have limited cooling and strict limits on background activity. They may slow down when hot, pause mining when you switch apps, or stop it when the screen locks.

Laptops generally offer more computing power, but you may hear louder fans, notice sluggish apps, and drain your battery quickly. Keeping a device hot for long periods can also speed up battery wear.

Check what a mining website actually does

A balance labeled “XMR” does not prove your browser is mining Monero directly. A service might mine another coin and convert the proceeds to Monero, or give you credits through a different reward system.

Before leaving a mining page running, check:

• What algorithm runs: Is it actually RandomX?
• How payouts work: What are the fees and minimum withdrawal amount?
• Whether mining stops: Can you pause it and confirm your processor usage falls?
• Whether rewards are verifiable: Is there evidence of real payouts beyond a number on the page?

Never give a mining website your wallet’s recovery phrase or private spending key. Those secrets control your funds. Be especially cautious if a site demands a deposit or an “unlock fee” before paying you.

Is it worth trying?

If you are curious, a brief, supervised test on your own device can show you how mining works. Stop if the device becomes uncomfortably hot or disrupts normal use.

For sustained mining, dedicated software generally makes better use of a suitable computer. Check a live profitability calculator using your measured mining speed, electricity rate, and fees. Do not assume tiny rewards will ever reach a website’s withdrawal threshold.

The bottom line

Browser mining of Monero remains technically possible, but it is a poor fit for most phones, tablets, and everyday laptops. Verify the service, protect your wallet secrets, and expect an experiment rather than meaningful earnings.