Is Legacy Launcher free to use?

Yes. Legacy Launcher is completely free of charge, and according to its official FAQ there are no paid features and there never will be. You can download and use the launcher itself without paying anything. The one important exception is the Flathub version, which requires a valid (paid) Minecraft account to work.

What "free" covers

The launcher is free as software. The official FAQ states plainly that it is "completely free of charge" and that there is "no and will never be no paid features." That means:

• No purchase is needed to download the launcher.
• No features are locked behind a payment.
• The developer says this will not change in the future.

So if your question is only about the launcher, the answer is straightforward: it costs nothing.

The Minecraft account question

Free launcher software and a paid Minecraft account are two separate things. Legacy Launcher is a launcher for Minecraft: Java Edition, and the game itself may still require a valid account depending on how you install it.

The clearest case is Flathub. The site notes that the Flathub version "requires valid (paid) Minecraft account." So on that distribution path, you do need a paid Minecraft account even though the launcher is free.

For other install methods, the page does not state an account requirement in the same explicit way, so don't assume a paid account is or isn't needed beyond what the site says. Treat the Flathub note as the documented condition.

A note on downloads from this website

There is a significant catch that affects how you get the launcher, though not whether it is free. The site states: "Downloads from this website have been halted. We've received a complaint from Mojang. You can't download the launcher from this website."

The page then suggests: "Isn't it a good time to finally purchase Minecraft?"

This means the free launcher may no longer be downloadable directly from llaun.ch. The FAQ's safety guarantee — that downloads from the website are free of malware — applies to downloads from that site, which the site says are halted. If you obtain the launcher elsewhere, that specific guarantee does not automatically carry over.

Quick summary

What to do next

If you already have the launcher or can obtain it through a supported channel, cost is not a barrier — it is free. If you plan to use the Flathub version, make sure you have a valid paid Minecraft account first, since that path requires one. And if you were expecting to download directly from llaun.ch, note that the site itself says those downloads have been halted, so plan around that rather than assuming the download button will work.