S3 Browser app iconFree for macOS, Windows and Linux

A Finder for your
S3 buckets.

Browse, copy, share, sync and back up files on Amazon S3, MinIO, DigitalOcean Spaces and any S3-compatible storage – in an app that feels at home on your desktop.

Version 0.5.0 · 22 October 2026

Works withAmazon S3MinIODigitalOcean SpacesUpCloudAny S3-compatible endpoint
Inside the app

Everything you do in Finder,
now in the cloud.

The things you reach for every day, plus a few Finder never learned.

media-assets
campaigns
hero@2x.jpg
hero-dark@2x.jpg
teaser.mp4
brand-guide.pdf
Desktop
Screenshots
budget.xlsx
notes.md
export.zip
config.json
hero@2x.jpg2

01Split view and drag & drop

Two buckets side by side, or a bucket next to your disk. Drag files between them to copy or move.

↑ 128 to upload↓ 3 to download− 1 to delete
↑photos/IMG_2041.heic
↑photos/IMG_2042.heic
↓contracts/2026-10.pdf
↑reports/q3.xlsx
−drafts/old-notes.md

02Sync folders

One way or both ways. See every upload, download and delete before anything happens.

Nightly mediamedia-assets → Samsung T7 · every day at 2:00 AM
Done Failed, you got a notification Tonight

03Scheduled backups

Buckets to an external disk, daily, weekly or every few hours – even when the app is closed.

sunset-harbour.jpg

04Quick Look

Press space to preview images, video, PDFs and text right from the bucket. Arrow keys step through the folder.

spring-campaign.mov412 MB of 1.2 GB · 8 parts in parallel
Queue2 waiting · pause, resume or cancel any time

05Built for big transfers

Large files upload in parallel parts with retries, from a queue you control.

prod⌘K
website-prodBucket
media-assets/campaigns/product-shotsFolder
Sync “Product images” nowSync

06Go anywhere with ⌘K

Type a few letters to jump to any bucket, folder or action.

How it works

From access key
to files in a minute.

  1. 1

    Connect

    Add an endpoint and an access key. Amazon S3, MinIO, Spaces, UpCloud – anything that speaks S3.

  2. 2

    Browse

    Your buckets appear in the sidebar. Open, preview, rename, copy and drag files like in Finder.

  3. 3

    Automate

    Keep folders in sync and let backups run on a schedule, even with the app closed.

Feels like Finder

Sidebar, column sorting, sheets, context menus and the shortcuts you already know. Light and dark mode follow your system.

Search everywhere

Search a folder recursively, a whole bucket, or every bucket on a connection at once.

Open, edit, save

Open a file in any app. When you save it, S3 Browser uploads the new version for you.

Share links and visibility

Create time-limited share links, or make objects public or private, for one file or a whole folder.

Clean up unfinished uploads

Find multipart uploads that never finished but still take up paid storage, and abort them in one go.

Favorites and tabs

Pin folders to the sidebar, open places in tabs and jump back to where you were.

Your keys stay safe

Access keys are stored in the system keychain, never in plain text.

Always up to date

The app checks for a new version on start and updates itself in place.

Your disk, too

Your Mac or PC shows up next to your buckets, so local files are one drag away.

Download

Get S3 Browser

Version 0.5.0 for every platform. Free, no account needed.

macOS

The app isn’t notarized by Apple yet, so the first launch says it can’t be opened. Click Done, open System Settings → Privacy & Security and click Open Anyway. Or run:

xattr -dr com.apple.quarantine "/Applications/S3 Browser.app"

Windows

Pick the installer to get automatic updates. The portable .exe runs without installing. If SmartScreen warns, click More info → Run anyway.

Linux

Make the AppImage executable with chmod +x S3Browser.AppImage and run it. It needs FUSE.