All your storage, together
Connect Amazon S3, Cloudflare R2, MinIO, and custom endpoints. Switch between saved connections without losing your place.
OPEN SOURCE · BUILT FOR WINDOWS
Your cloud storage.Finally feels like files.
A free, open-source Windows desktop client for Amazon S3, Cloudflare R2, MinIO, and other S3-compatible storage. Browse, organize, preview, and transfer objects across buckets and providers in one workspace.
A free, open-source S3 file manager for Windows. Manage Amazon S3, Cloudflare R2, MinIO, and more in one workspace.
Windows desktop app · Free and open source · No account required
ONE WORKSPACE, MANY PROVIDERS
Connect to the storage you already use.
Keep your buckets and endpoints side by side, without jumping between consoles.
Amazon S3
Cloudflare R2
MinIO
Other S3-compatible endpoints
THE ESSENTIALS, DONE WELL
Everything in its right place.
Familiar file management, with the tools you need for working with object storage.
A familiar way to explore
Navigate with tabs and breadcrumbs, search and sort objects, and choose the view that fits the job.
Transfers in full view
Drag and drop uploads, download folders, and follow progress, retries, and failures from one transfer center.
Copy and move across buckets
Use familiar shortcuts or Copy to… across buckets and connections, with explicit conflict choices.
Look before you open
Preview text, images, and PDFs, inspect object details, and edit supported text files in place.
Control by design
Use read-only connections and bucket or prefix restrictions. Credentials are kept in Windows Credential Manager.
UP AND RUNNING
From connection to action in three steps.
The same familiar rhythm, whether you work with a single bucket or several providers.
01
Add a connection
Choose a provider, enter your endpoint and credentials, then test the connection.
02
Find your files
Open a bucket, move through folders, and use tabs, search, and sorting to navigate.
03
Get things done
Drag files in, download folders, preview content, or copy and move across locations.
A CLOSER LOOK
A workspace worth opening.
Real views from Cavdeck—clean, practical, and made for everyday work.
LESS CONTEXT SWITCHING
One place for every connection.
Bring the storage you use into one organized workspace. Open your destinations in tabs, jump back to favorites or recent locations, and stay focused on the task—not the provider console.
- Multiple connections, one navigation
- Quick access with Favorites and Recent
- Light, dark, and system appearance
CONTROL THAT STARTS WITH YOU
Your storage stays yours.
Cavdeck is a desktop client, not a hosted storage service. It connects from your Windows PC to the endpoints you configure, while your storage provider remains in control of access.
Read the security and privacy notesDirect connections
Connect from your PC to configured S3-compatible endpoints—without routing your files through a Cavdeck service.
Credentials stay local
Connection credentials are stored in Windows Credential Manager. No Cavdeck account is needed.
Scoped access
Use read-only connections or limit access to a bucket and key prefix. Your provider's permissions remain authoritative.
Is Cavdeck free to use? Can I use it at work?
Cavdeck is free and open source under GPL-3.0-or-later. Commercial use is allowed, provided you follow the license terms. Third-party components keep their own licenses.
Which storage services can I connect?
Cavdeck supports Amazon S3, Cloudflare R2, MinIO, and custom S3-compatible endpoints. The service must support the S3 API; available operations can vary by provider.
Does Cavdeck run on macOS or Linux?
No. Cavdeck is a Windows desktop app. Windows 11 is the primary test target, and the published installers are for Windows x64.
Why can't I see my buckets?
Listing all buckets requires permission from your storage provider. If your credentials can access one bucket but cannot list the account's buckets, enter that bucket directly in the connection settings. You can also set a key prefix if needed.
Can I copy or move files between providers?
Yes, when both endpoints support the operations needed for a safe transfer. The data passes through your PC rather than moving directly between providers, so keep the PC online and check for provider request or transfer charges. For a move, Cavdeck copies and verifies the destination before deleting the source; this is not an atomic rename. A move also requires permission to delete the source and to write to and verify the destination.
What is required for cross-connection transfers?
Cross-connection transfers rely on source and destination support for the safeguards Cavdeck uses, including ETag checks, ranged reads, and conditional writes. S3-compatible providers do not all implement the same operations. Cavdeck does not bypass these checks, so a transfer may be unavailable for an endpoint pair that lacks a required capability.
What if a file with the same name is already there?
When a name conflict occurs, choose Skip, Keep Both, or Overwrite. Cavdeck will not overwrite a file just because its name matches; you must choose that action for the operation.
Which files can I preview?
Cavdeck previews supported text files up to 1 MiB, images up to 15 MiB, and PDFs up to 100 MiB. Supported image formats include PNG, JPG/JPEG, GIF, BMP, and WebP. PDF preview also requires the Microsoft Edge WebView2 Runtime.
Does Cavdeck sync folders on my PC?
No. Cavdeck is a file manager for S3-compatible storage, not a folder-sync or backup tool. You can upload and download files when you choose, but it does not keep a local folder in continuous sync.
Are S3 folders real directories?
No. S3 stores objects under keys; what looks like a folder is a key prefix. Renaming or deleting a folder can affect multiple objects under that prefix. Cavdeck previews the affected objects and asks for confirmation before a rename or delete, so review the item count and target carefully.
Why does Windows show an Unknown Publisher or SmartScreen warning?
The installers on GitHub Releases are currently unsigned, so Windows may show an Unknown Publisher or SmartScreen warning. Download Cavdeck only from the official GitHub Releases page and compare the SHA-256 checksum with the value published for that release.
Can I create a temporary download link?
For providers that support presigned downloads, Cavdeck can create a time-limited presigned download link (GET request). This does not make the bucket public or change its permissions. Anyone with the link can download the object until it expires, so treat the link like a password. You can also generate a public object URL when an HTTPS bucket URL is configured; the object must already be publicly accessible. Cavdeck does not change bucket or object permissions.
READY FOR A BETTER WORKFLOW?
Make room for simpler storage management.
Explore the releases or get involved in building a better, open-source S3 explorer for Windows.