WinSCP for S3 — when a dedicated S3 client helps
In short: WinSCP is a free (GPL) Windows file transfer client that supports S3 alongside SFTP, FTP, WebDAV and SCP. It is a good fit for moving files to a bucket. A dedicated S3 client such as S3 Explorer adds S3-specific features (versions, metadata, presets for S3-compatible providers, search in large buckets) and runs on macOS and Linux too.
What WinSCP does with S3
- Buckets appear as folders at the root; creating a folder there creates a bucket.
- It uses the S3 REST API and documents connection guides for Amazon S3, Google Cloud Storage, Backblaze B2, Cloudflare R2 and Oracle Object Storage, and says other S3-API services work too.
- Scripting and a .NET assembly make it useful for automated transfers on Windows.
A documented quirk: buckets shared from another account, or buckets you are not allowed to list, do not appear at the root; you set /bucketname as the initial remote directory instead.
At a glance
| WinSCP | S3 Explorer 0.3.9 | |
|---|---|---|
| Platforms | Windows | Windows, macOS, Linux |
| License | Free, GPL v3 | Free with all features, 5 profiles; licence 11.50 € lifetime |
| Protocols | SFTP, FTP, WebDAV, SCP, S3 | S3 and S3-compatible only |
| S3-compatible setup | Endpoint per provider guide | 25 built-in presets + custom endpoint |
| Automation | Scripting, .NET assembly | Not the focus |
| Object versions, tags, metadata | Not covered in its S3 guide | Browse and manage |
| Large buckets | Folder listing | Local index for search |
Which one to choose
- Windows, several protocols, scripted transfers: WinSCP.
- macOS or Linux: S3 Explorer (WinSCP is Windows-only).
- Daily S3 work: versions, metadata, several providers, large buckets: S3 Explorer.
Sources
- WinSCP: connecting to Amazon S3
- WinSCP: S3 protocol and compatible services
- WinSCP license (GPL v3)
- S3 Explorer pricing
Comparison based on WinSCP's documentation and S3 Explorer 0.3.9, on October 15, 2026. S3 Explorer is developed by the publisher of this site.