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S3 Browser

S3 Browser is a free Windows application with an intuitive graphical interface that lets you manage buckets and objects on Simple Storage without using the command line. It is a popular choice for Windows users who want drag-and-drop operations, file previews, and easy permission management.

Requirements
  • Operating system: Windows 7/8/10/11 (32-bit or 64-bit)
  • An Access Key ID and Secret Access Key from the LANIT Cloud Portal (see Access Key)

Access Key management page on LANIT Cloud Portal

Installing S3 Browser​

Step 1: Download S3 Browser from the official website: https://s3browser.com

Choose the appropriate edition:

  • Free — free of charge, sufficient for individuals and small businesses
  • Pro — includes advanced features such as FTP bridge and scheduled sync

Step 2: Run the .exe installer and follow the on-screen instructions.

Step 3: Launch S3 Browser after installation.

Adding a LANIT Cloud Account​

Step 1: On first launch, S3 Browser opens the Add New Account dialog automatically. Otherwise, go to Accounts → Add New Account.

Step 2: Fill in the account details:

FieldValue
Account NameA friendly name (e.g., LANIT Cloud)
Account TypeSelect S3 Compatible Storage
REST Endpoints3.lanit.com.vn
Access Key IDYour Access Key ID from the LANIT Cloud Portal
Secret Access KeyYour Secret Access Key from the LANIT Cloud Portal

Step 3: Uncheck Use secure transfer (SSL/TLS) only if you have a specific reason; otherwise leave it enabled (HTTPS recommended).

Step 4: Tick Use path style URLs — required for LANIT Cloud.

Step 5: Click Add new account to save.

Main Interface​

After a successful connection, S3 Browser displays:

  • Left panel: Bucket directory tree — a list of all buckets in your account
  • Right panel: Contents of the selected bucket/folder
  • Toolbar: Common actions (upload, download, create bucket, delete, etc.)

Basic Operations​

Creating a New Bucket​

Step 1: Right-click in the bucket list area (left panel) and select Create New Bucket.

Step 2: Enter the bucket name and click OK.

Uploading Files/Folders​

Method 1 — Drag & Drop: Drag files or folders from Windows Explorer and drop them into the bucket content area on the right.

Method 2 — Upload Button:

  • Select the destination bucket/folder in the left panel
  • Click Upload on the toolbar
  • Select the files to upload

Method 3 — Upload Folder:

  • Click Upload → Upload Folder
  • Select the folder to upload

Downloading Files​

Step 1: Select the file to download in the right panel.

Step 2: Drag the file to Windows Explorer, or right-click and select Download.

Step 3: Choose the destination folder on your computer.

Deleting Objects​

Step 1: Select the file or folder to delete.

Step 2: Press the Delete key or right-click and select Delete.

Step 3: Confirm the deletion.

Step 1: Right-click a file and select Generate Presigned URL.

Step 2: Choose the expiration time.

Step 3: Copy the URL and share it.

Folder Sync​

S3 Browser supports two-way synchronization between a local folder and a bucket:

Step 1: Go to Tools → Folder Sync.

Step 2: Select the source folder (local) and the destination bucket/prefix.

Step 3: Choose the sync mode:

  • Upload changes only: Only upload new or modified files
  • Bidirectional: Sync in both directions
  • Mirror: Delete destination files that no longer exist in the source

Step 4: Click Synchronize to start.

Advanced Settings​

Configuring Upload/Download Thread Count​

Go to Edit → Settings → Connection:

  • Number of worker threads: Number of parallel processing threads (default is 5; increase to improve speed)

Enabling HTTPS​

Go to Accounts → Edit Account Settings and make sure Use secure transfer (SSL/TLS) is enabled.

Troubleshooting​

Connection error "Unable to connect":

  • Check the endpoint: it must be s3.lanit.com.vn (without a leading https://)
  • Enable Use path style URLs
  • Verify your Access Key ID and Secret Access Key are correct

Buckets not visible:

  • Check that the Access Key has the s3:ListBucket permission
  • Try Refresh on the bucket list

Slow uploads:

  • Increase the thread count in Settings → Connection
  • Check your network connection