The easy, lightweight way to work with S3
Unlimited S3 connections, bucket browsing, drag-and-drop file transfers, and multi-account management.
Everything you need, nothing you don’t
A focused tool for working with S3 — with unlimited connection setups.
Unlimited connections
Personal, work, or client projects — register as many S3 connections as you need and switch with a single click.
Browse buckets and folders per connection
Switch connections with a single click, then explore buckets, folders, and files at a glance.
Upload and download with ease
Drag files in to upload, click to download. Track progress in real time.
Your credentials stay on your machine
Access keys are encrypted with Windows DPAPI. Nothing leaves your computer.
Multiple accounts, one window
Switch between personal, work, or client accounts with a single click.
Works with S3-compatible services
Not just AWS — connect to MinIO, Cloudflare R2, Backblaze B2, Wasabi, and any S3-compatible endpoint.
Up and running in minutes
Four steps from download to your first file transfer.
Download and install
Grab the Windows installer and run it — Stash3 is ready in seconds. macOS and Linux builds are on the way.
Add a connection
Enter your AWS access key. For S3-compatible services, just add the endpoint URL. Named profile and SSO support are coming soon.
Browse your buckets
Your buckets appear in the sidebar. Click into any one to explore folders and files.
Upload or download
Drag files into the window to upload. Click the download button on any file. Track progress at the bottom of the screen.
Download Stash3
Free, no account required.
Current release: v0.2.5 — released Apr 22, 2026
macOS and Linux builds are in the works.
If Windows shows a security warning
Stash3 is not yet code-signed. The first time you run the installer, Windows SmartScreen may display an "Unknown publisher" warning. This does not mean the file is unsafe — it simply means the publisher has not paid for a code signing certificate yet.
To proceed:
- Click "More info" on the warning dialog.
- Click the "Run anyway" button that appears.
We recommend verifying the SHA256 hash below before running the installer.
Verify file integrity (SHA256)
SHA256 is a unique fingerprint of the file. If the hash of your downloaded file matches the value below, the file is intact and has not been tampered with in transit.
a405737a507160c95151e361645972126c8ac91d45e9487f07c4eaa863cade85 Get-FileHash -Algorithm SHA256 "<path>\Stash3 for Amazon S3-0.2.5 Setup.exe"Replace the path with your actual downloaded file location. If the output matches, you are good to go.