01 — The short answer
It does not exist, and it is not coming
GarageBand is made by Apple for macOS, iPadOS and iOS. Apple has never released a Windows version, has never announced one, and GarageBand is part of how Apple sells Macs, so a Windows release would work against the reason it exists.
That is the whole answer to the question as asked. The useful question is the next one: what were you going to use it for?
02 — A word of caution
About the download sites
Search for this and you will find pages offering a GarageBand download for Windows 10 or 11, often with an installer and a set of instructions. Since Apple does not make Windows software, whatever those sites are distributing is not GarageBand.
In practice these fall into a few groups: a different program renamed, an installer bundled with things you did not ask for, or a page that exists to collect ad revenue from the search term. None of them give you Apple's software, because there is no Apple software to give.
The other approach you will see suggested is running macOS in a virtual machine. It is technically possible, it breaks Apple's licence terms on non-Apple hardware, and the audio performance is poor in exactly the way that matters for recording. It is not a practical answer.
03 — Decide first
GarageBand is really two products
People reach for GarageBand for two quite different reasons, and the right replacement is different for each. Choosing before you download anything saves a lot of wasted effort.
The first is recording and editing a voice: a podcast, a voiceover, an audiobook chapter, narration for a video. This needs a recorder, clean-up tools and an export, and almost none of what a music program offers.
The second is making music: loops, virtual instruments, MIDI, arranging parts. This needs a full digital audio workstation, and a voice recorder will not do.
04 — If you want to record a voice
The options on Windows
Audacity is the closest free like-for-like. It runs on Windows, it is open source, it records and edits multi-track audio, and there is a very large body of tutorials for it. It is less friendly than GarageBand and considerably more capable than most people need.
Browser-based tools are the other route, and the one that most resembles GarageBand's actual appeal: open it and start, with no install and nothing to configure. They also tend to include the clean-up steps that GarageBand leaves you to do by hand.
Hilite is one of those, and we make it, so read that recommendation with the appropriate scepticism. It records in the browser on any operating system, removes filler words and background noise, and publishes to podcast platforms. If you want a straightforward multi-track editor and nothing else, Audacity is free and will serve you well.
Windows also has Sound Recorder built in. For a single voice with no editing, it is genuinely enough, and it is already installed.
If the job is one person talking into a microphone, you almost certainly do not need a digital audio workstation. Most people arriving at GarageBand for a podcast are using perhaps five per cent of it.
05 — If you want to make music
Windows DAWs that fill the gap
Cakewalk is the usual recommendation for a free, full-featured Windows DAW with a long professional history behind it. LMMS is free, open source and cross-platform, and leans towards loop and pattern-based production in a way that will feel familiar if GarageBand's loop browser was the appeal.
Reaper is inexpensive, extremely capable, and has an unusually generous evaluation period. FL Studio and Ableton Live are the paid options people move to when they get serious, and both are considerably more powerful than GarageBand ever was.
Expect a steeper start than GarageBand. Part of what made GarageBand pleasant was that Apple hid most of the decisions, and Windows alternatives generally do not.
06 — The overlooked option
You may already own it
GarageBand is free on iPhone and iPad. If you have either, you already have it, and for recording a voice or sketching a musical idea the mobile version does most of what the Mac one does.
This is often the fastest route for someone with a Windows PC and an iPhone in their pocket. Record on the phone, then move the file to the computer to finish.
One thing that will not work: opening a GarageBand project file on Windows. The .band format is Apple's and nothing on Windows reads it. If you have projects on a Mac you are leaving behind, open each one and export finished audio before you switch, because the projects themselves will not come with you.
Record on Windows without installing anything
Browser recording, noise and filler removal, and publishing in one place.
Recording and editing, in a browser, on any machine.
Try Hilite free.