S3 Client for Windows 11: Six GUI Tools Compared

This is the Windows edition of the S3 GUI client overview. The Linux edition covers the AppImage, the .deb and davfs2; the Mac edition covers Homebrew and Finder. Every licence, version and system requirement below was read on the vendor's own pages in September 2026.

What Windows expects, and what S3 does not give it

Windows users arrive with two expectations. The first is File Explorer: folders on the left, a file list on the right, drag and drop that behaves. The second is a drive letter — a path that Photoshop, Premiere, a build script or a fifteen-year-old line-of-business application can open without knowing what a bucket is.

Object storage satisfies neither on its own. No release of Windows, Windows 11 included, ships an s3:// handler, so a bucket cannot be typed into the address bar the way \\server\share can. And anything that produces a drive letter here does it in one of two ways: a filesystem driver installed into the kernel, or the WebClient service that Windows already carries for WebDAV. That single choice, not the file list, is what separates the tools below.

Two Windows facts worth knowing before you install anything. Installation scope matters — the AWS CLI documents a per-user install needing no admin rights and an all-users install that does, and rclone warns that "Drives created as Administrator are not visible to other accounts". And an installer without an Authenticode signature raises a SmartScreen warning on first run, which is true of several small tools in this category, ours included.

The field, September 2026

CS Browser, the one that used to be called S3 Browser

If you have searched this before, you searched for S3 Browser. The product is now published as CS Browser, version 13.5.7 released on 16 August 2026, and it is still the widest Windows compatibility on the list: Windows 7 SP1, 8.1, 10 and 11, plus Windows Server 2008 R2 SP1 through 2025.

The part almost nobody quotes is the licence. Its own purchase page states: "CS Browser is free for personal use only. Users who run the application in commercial, business, government, or military institutions, or for any other profit activity must purchase a Pro license." Pro is $49.99 for the first licence, then $46.99 each for the second through sixth, $43.99 for the seventh through twentieth, and down to $35.99 above fifty seats, described as lifetime with one year of free upgrades and support.

So the most Windows-native S3 browser in existence is not a free tool at work. That is the single fact that decides this comparison for a lot of people.

Cyberduck, free and genuinely unrestricted

Cyberduck 9.5.4, released 25 August 2026, requires "Windows 10 (64bit) or later". It is free and GPL-licensed, it is also sold through the Windows Store, and the only nag is a donation prompt that a registration key — a minimum $10 donation — removes. Protocol coverage is the widest of any free desktop tool here: S3, Backblaze B2, Azure, OneDrive, Google Drive, Dropbox, Wasabi, Google Cloud Storage, Box, Nextcloud, SMB, FTP, SFTP and WebDAV.

What it will not do is mount. Mounting is the job of Mountain Duck, its paid sibling, which is a separate purchase. If you want a window and nothing else, stop reading here and use Cyberduck; the Cyberduck alternatives page works through the cases where people still leave it.

MSP360 Explorer, the freeware that is also Wasabi's client

MSP360 Explorer is the former CloudBerry Explorer. The freeware edition "comes with all the basic functionality including cloud storage account access, file/folder transfer, resumable upload and more", and PRO is $59.99 as a one-time per-computer licence with a 15-day trial. The freeware edition leaves out client-side encryption, compression, multithreaded transfers, search, upload rules and FTP/SFTP.

Two things are easy to miss. Mounting is a different product — MSP360 Drive, formerly CloudBerry Drive — so Explorer alone gives you no drive letter. And this codebase turns up under other names: Wasabi's own free client is documented as a customised build of CloudBerry Explorer, which is covered on the Wasabi client page.

WinSCP, if it is already on the machine

WinSCP describes itself as "an open source free SFTP client, FTP client, WebDAV client, S3 client and SCP client and file manager for Windows". Free, Windows only, and S3 is a protocol option in the login dialog that takes an access key ID and a secret access key.

Its documented S3 limitation is worth knowing before you blame your credentials: "You will not see buckets that were shared with you by another AWS user, in the root listing. To access such buckets, you have to specify /bucketname as an initial Remote directory." The same workaround applies when your key has no permission to list buckets — which is the normal state of a well-scoped IAM user. WinSCP's S3 guide does not document custom S3-compatible endpoints or path-style addressing, so treat those as not documented rather than supported.

The AWS CLI, because sometimes you only need one copy

For a single scripted copy, nothing beats the CLI. AWS supports it on "Microsoft-supported versions of 64-bit Windows" and documents a per-user install that needs no admin rights, plus MSI packages for managed fleets:

irm https://awscli.amazonaws.com/v2/install.ps1 | iex
msiexec.exe /i https://awscli.amazonaws.com/AWSCLIV2.msi
msiexec.exe /i https://awscli.amazonaws.com/AWSCLIV2-User.msi /qn

This is the right tool for a copy you can describe in advance and the wrong one for finding an object whose name you half remember, three prefixes deep.

rclone plus WinFsp, the classic drive letter

rclone is the strongest tool on this page and it is free. For a drive letter on Windows it needs help: "To run rclone mount on Windows, you will need to download and install WinFsp." With WinFsp in place, a letter is one command:

rclone mount myremote:mybucket X: --vfs-cache-mode writes

Three caveats from rclone's own documentation. By default the mount appears as a fixed disk; --network-mode makes it a network drive and then a drive letter is mandatory. If the program using the mount needs to write files, "chances are you will have to enable VFS File Caching as well". And drives created from an elevated prompt are invisible to other accounts. None of that is unreasonable — it is a kernel driver plus a cache policy, and that is the price of the letter.

AnyStorage, and the letter without a driver

AnyStorage 0.2.25 shipped on 23 September 2026 with two Windows assets, both x64: AnyStorage_0.2.25_x64-setup.exe at 6.54 MB and AnyStorage_0.2.25_x64_en-US.msi at 9.05 MB. The supported floor is Windows 10 or newer. There is no arm64 Windows build, and the Windows installers are not yet Authenticode-signed, so expect the SmartScreen prompt.

The drive letter comes from a different direction. The app talks S3 over the ordinary API, then re-serves everything currently connected through a WebDAV server on loopback, and Windows has had a WebDAV client for twenty years. So there is no WinFsp, no kernel driver and no reboot — but there is the Windows WebClient service, which has its own three famous problems. Those are documented step by step on map an S3 bucket as a network drive rather than repeated here.

Beyond S3, Cloudflare R2, Backblaze B2, Google Cloud Storage, Azure Blob, Alibaba Cloud OSS and Tencent Cloud COS are separate connection types rather than S3 plus a hand-typed endpoint, out of more than 20 types. MinIO, Wasabi and Hetzner Object Storage go through the S3 type with a custom endpoint URL. Credentials stay encrypted on the PC and there is no account to create.

The honest limits: the free tier allows two connections and serves the mount read-only, so a writable drive letter is a paid feature; 0.2.25 is a young application next to Cyberduck's twenty-four years; and there is no command line, so on a display-less Windows Server the AWS CLI or rclone remains the right answer. What the free tier does allow is commercial use, which is exactly where CS Browser stops.

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