Brows3 S3 Browser Logo
Brows3
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v0.2.34 • FREE & OPEN SOURCE S3 BROWSER
Brows3 - Free S3 Browser

Brows3

The Fastest Free S3 Browser & Desktop Client

Free S3 Browser
Windows
macOS
Linux

The best free S3 browser for developers. Browse and manage your Amazon S3, MinIO, Wasabi, Cloudflare R2, and DigitalOcean Spaces buckets with blazing speed. Built with Rust for instant folder navigation across millions of objects. A faster, open source alternative to Cyberduck and CloudBerry.

GitHub

S3 Browser Overview

Why Brows3 is the best free S3 browser for developers

The Problem with Traditional S3 Browsers

Traditional S3 browsers and file clients suffer from slow performance when navigating deep folder structures or listing large numbers of objects. Whether you're using the AWS Console, Cyberduck, CloudBerry, or other S3 GUI tools, you've likely experienced frustrating wait times when browsing S3 buckets with thousands of objects. Brows3 is a free, open-source S3 browser and desktop client for AWS S3, MinIO, Cloudflare R2, Wasabi, and DigitalOcean Spaces that completely rethinks the S3 browsing experience.

Why Brows3 is the Best S3 Browser

  • Instant S3 Navigation

    After an initial index, S3 folder traversal happens instantly. No more waiting for loading spinners when clicking through S3 directories.

  • Deep S3 Search

    Perform instant, recursive searches across your entire S3 bucket. Find any object in milliseconds, even in massive datasets.

  • Intelligent Background Indexing

    Brows3 populates its local S3 cache in the background while you work, ensuring your bucket view is always synchronized without blocking your interaction.

  • Hyper-Virtuoso Table

    Our custom-tuned virtualization engine handles S3 listings of 100,000+ items with silky-smooth scrolling at 60fps - something no other S3 browser can match.

  • S3-Compatible Storage Support

    Works as a browser for any S3-compatible service: AWS S3, MinIO, Cloudflare R2, Wasabi, DigitalOcean Spaces, Backblaze B2, and more.

Built for Performance

Prefix-Indexed S3 Caching

Unique architecture organizes S3's flat object list into a hierarchical tree for sub-millisecond folder traversal - the fastest S3 browsing engine available

Rust Core

High-performance Rust backend with near-instant S3 operations and smart concurrency handled via Tauri

Tauri Framework

Native desktop S3 browser application with minimal memory footprint - uses 10x less RAM than Electron-based alternatives

React + Next.js UI

Modern, responsive S3 browser UI exported as a static site for optimal rendering performance

Download S3 Browser - Free

Get the fastest free S3 browser for Windows, macOS, and Linux. No subscription required, no trial period.

PlatformArchitectureTypeAction

macOS

Apple Silicon (M1/M2/M3)

Apple Silicon (M1/M2/M3)

DMGDownloadGet

macOS

Apple Silicon (M1/M2/M3)

Apple Silicon (M1/M2/M3)

TAR.GZDownloadGet

macOS

Intel (x64)

Intel (x64)

DMGDownloadGet

macOS

Intel (x64)

Intel (x64)

TAR.GZDownloadGet

Windows

x64

x64

EXEDownloadGet

Windows

x64

x64

MSIDownloadGet

Linux

x64 (amd64)

x64 (amd64)

AppImageDownloadGet

Linux

x64 (amd64)

x64 (amd64)

DEBDownloadGet

System requirements

  • macOS 10.15 or later
  • Windows 10 or later
  • Linux with GTK 3.24 or later

Looking for older versions? View all releases on GitHub

S3 Browser Features

Comprehensive feature overview of the Brows3 S3 browser

S3 File Management

  • Breadcrumb Navigation

    Path-based navigation for rapid traversal of complex hierarchies

  • Bulk Operations

    Upload, download, and delete multiple files or recursive folders at once

  • Mixed Content Support

    Seamlessly handle folders and files in a single drag-and-drop operation

  • Copy-to-Clipboard

    Quick copy of S3 Paths, Keys, and Object URLs

  • Presigned URL Sharing

    Generate temporary object links with configurable expiry directly from the bucket view

S3 File Previews & Editing

  • Built-in Editor

    Powered by Monaco (VS Code's Engine). Edit text, JSON, and code files directly in S3

  • Media Previews

    Native support for high-resolution images, videos, and PDFs

  • In-App PDF Preview

    View PDFs with embedded search, navigation, and focused reading mode

  • Rendering Indicators

    Clear visual feedback for large image rendering states

S3 Browser Speed & Performance

  • Rust-Powered Backend

    Core logic is written in Rust for near-instant operations

  • Smart In-Memory Caching

    Sub-millisecond navigation with auto-invalidation after uploads/deletes and 30-minute TTL

  • Lazy Loading

    Efficiently handles buckets with millions of objects

Enterprise S3 Access

  • Direct Bucket Access

    Instantly navigate to specific buckets even without s3:ListBuckets permission

  • Profile-Gated Access

    Create isolated profiles for different AWS accounts or environments

  • Cost Awareness

    UI indicators for cached data help you manage S3 API costs

Additional S3 Browser Features

  • Deep Recursive Search

    Toggle between local filtering and server-side recursive search to find objects buried deep in subfolders

  • System Monitor

    Real-time visibility into application performance with API request tracking and live logs

  • Enhanced Settings

    Manage application data, clear cache, check for updates, switch themes, and configure default regions

  • Auto-Updates

    Seamless background updates ensure you're always on the latest secure version

  • Smart Tab Management

    Intelligent tab deduplication and automatic switching avoids duplicate S3 paths

  • Automatic Region Discovery

    Detects correct AWS regions from system configuration for zero-config profile setup

S3 Browser Comparison

How Brows3 compares to other S3 browsers - Cyberduck, CloudBerry Explorer, and S3 Browser (NetSDK)

FeatureBrows3CyberduckCloudBerryS3 Browser
Instant S3 Navigation (Prefix Caching)
Prefix-Indexed Architecture
Rust-Powered Core
100k+ Item Virtual Scrolling
Monaco Editor (VS Code Engine)
Deep Recursive Search
MinIO / R2 / Wasabi Support
Open Source (MIT License)
Cross-Platform (Mac/Win/Linux)
Free - No Trial or Subscription
PDF / Image / Video Previews
Presigned URL Generation

Brows3 is the best free S3 browser for developers who need sub-millisecond navigation and high-performance list rendering. Unlike other S3 browsers, Brows3 caches the entire bucket structure for instant folder traversal.

Architecture

Technical design and data strategy

Brows3 leverages a tiered data strategy to achieve its performance:

  • 1. Rust Core (The Muscle)

    Handles all heavy-lift S3 networking, credential management, and local indexing using high-speed concurrency

  • 2. Prefix-Indexed Tree

    An in-memory data structure that organizes S3's flat object list into a hierarchical tree, enabling instant directory lookup

  • 3. Paginated IPC Bridge

    Data is transferred between Rust and the React frontend over a high-speed, paginated IPC channel, preventing UI hangs during large data transfers

  • 4. SSG React (The UI)

    A Next.js-based frontend exported as a static site, providing the smallest possible memory footprint

Build Guide

Build from source for your platform

Prerequisites (All Platforms)
  • Node.js v20+ and pnpm

    Install pnpm via: npm install -g pnpm

  • Rust

    See platform-specific instructions below

Windows Setup

1. Install Rust

Download and run the installer from rustup.rs or run in PowerShell:

winget install Rustlang.Rustup

2. Restart your terminal

Restart your terminal to refresh the PATH

3. Verify installation

cargo --version
rustc --version

4. Clone and run

git clone https://github.com/rgcsekaraa/brows3.git
cd brows3
pnpm install
pnpm tauri dev
macOS Setup

1. Install Rust

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source ~/.cargo/env

2. Install Xcode Command Line Tools

xcode-select --install

3. Clone and run

git clone https://github.com/rgcsekaraa/brows3.git
cd brows3
pnpm install
pnpm tauri dev
Linux Setup

1. Install Rust

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source ~/.cargo/env

2. Install system dependencies (Debian/Ubuntu)

sudo apt update
sudo apt install -y libgtk-3-dev libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf

3. Clone and run

git clone https://github.com/rgcsekaraa/brows3.git
cd brows3
pnpm install
pnpm tauri dev
Release Build (All Platforms)
pnpm tauri build

Contributing

Join the open source community

We welcome contributions from the community! Whether you are a Rustacean, a React developer, or a technical writer, your help is appreciated.

Contributors
  • Founder & Maintainer

    rgcsekaraa

  • Core Engineering

    Brows3 Open Source Team

How to Contribute
  • 1. Check the Issues

    Look for "good first issue" labels on GitHub

  • 2. Standard Workflow

    Fork → Branch → Commit → Pull Request

  • 3. Code Quality

    Ensure Rust code is formatted with cargo fmt and TS code with pnpm lint

View Contributing Guide

Feature Request

Help us improve Brows3 by sharing your ideas

​
Your Name *
​
Email Address *
​
​
Feature Category *
​
Feature Title *
​
Detailed Description *

Your request will be reviewed by our development team. We may reach out to your email for additional details.

Brows3 - Free S3 Browser • Open Source on GitHub

Brows3 - Free S3 Browser for Mac, Windows & Linux

The Best Free S3 Browser

Brows3 is the fastest free S3 browser available. A high-performance, open-source desktop client for browsing and managing AWS S3 buckets, MinIO, Cloudflare R2, Wasabi, DigitalOcean Spaces, and all S3-compatible object storage. Built with Rust for instant folder navigation through millions of objects. Download the best S3 browser free for Mac, Windows, and Linux at brows3.app.

Unlike traditional S3 browsers like Cyberduck, CloudBerry Explorer, or S3 Browser by NetSDK, Brows3 uses prefix-indexed caching architecture that enables instant S3 folder traversal without loading delays - even in buckets containing millions of objects.

Download S3 Browser - Free

Download the fastest free S3 browser for your platform. No subscription required, no trial period, no feature limitations. Brows3 is 100% free and open source under the MIT license.

  • macOS - Apple Silicon (M1/M2/M3/M4) DMG: Download S3 Browser for Mac (Apple Silicon)
  • macOS - Intel DMG: Download S3 Browser for Mac (Intel)
  • Windows - EXE Installer: Download S3 Browser for Windows
  • Windows - MSI Installer: Download S3 Browser MSI for Windows
  • Linux - AppImage: Download S3 Browser for Linux (AppImage)
  • Linux - DEB: Download S3 Browser for Linux (DEB)

Current version: v0.2.34. View all releases on GitHub.

S3 Browser Features

Instant S3 Navigation

The defining feature of Brows3 as an S3 browser is instant folder navigation. After an initial background index, traversing S3 directories happens in sub-milliseconds - no loading spinners, no API call delays. Navigate through millions of S3 objects as fast as a local filesystem.

S3 File Management

  • Breadcrumb navigation for rapid S3 directory traversal
  • Bulk upload, download, and delete - multiple files and recursive folders
  • Drag-and-drop S3 file uploads with mixed content support
  • Copy S3 paths, keys, and object URLs to clipboard
  • Generate presigned URLs for S3 object sharing with configurable expiry

S3 File Preview & Editing

  • Built-in Monaco Editor (VS Code engine) - edit text, JSON, YAML, and code files directly in S3
  • Native PDF preview with search, navigation, and focused reading mode
  • High-resolution image and video previews for S3 objects

S3 Browser Performance

  • Rust-powered backend - near-instant S3 operations with smart concurrency
  • Prefix-indexed caching - sub-millisecond S3 folder traversal with auto-invalidation
  • Hyper-Virtuoso Table - 60fps virtual scrolling through 100,000+ S3 objects
  • Lazy loading for buckets with millions of objects

Enterprise S3 Access

  • Direct bucket access without s3:ListBuckets permission
  • Multiple AWS profiles and accounts
  • Custom S3-compatible endpoints for MinIO, Wasabi, R2, and more
  • Automatic region discovery from system configuration

Deep S3 Search

Search across millions of S3 objects instantly. Brows3 performs searches locally against its cache for instant results, with an option for deep recursive server-side search to find objects buried in subfolders.

S3 Browser Comparison - Brows3 vs Cyberduck vs CloudBerry vs S3 Browser

Brows3 is the best free S3 browser compared to Cyberduck, CloudBerry Explorer, and S3 Browser by NetSDK. Here is how Brows3 compares to other S3 browsers:

FeatureBrows3CyberduckCloudBerryS3 Browser
Instant S3 Navigation (Prefix Caching)YesNoNoNo
Rust-Powered PerformanceYesNoNoNo
100k+ Item Virtual ScrollingYesNoNoNo
Monaco Editor (VS Code Engine)YesNoNoNo
PDF / Image / Video PreviewsYesNoNoNo
Free & Open SourceYesYesNoNo
Cross-Platform (Mac/Win/Linux)YesYesNo (Windows only)No (Windows only)
MinIO / R2 / Wasabi SupportYesYesYesNo
Deep Recursive S3 SearchYesYesYesYes

Brows3 is the best Cyberduck alternative for S3. While Cyberduck is a general-purpose file transfer client, Brows3 is purpose-built as an S3 browser with prefix-indexed caching that enables instant navigation - something no other S3 browser can match.

S3 Browser Architecture

Brows3 achieves its industry-leading S3 browsing performance through a tiered architecture:

  1. Rust Core - Handles all S3 networking, credential management, and local indexing using high-speed concurrency
  2. Prefix-Indexed Tree - An in-memory data structure that organizes S3 flat object lists into a hierarchical tree for instant directory lookup
  3. Paginated IPC Bridge - High-speed data transfer between Rust and the React UI, preventing hangs during large S3 listing operations
  4. React + Tauri UI - Native desktop S3 browser with the smallest possible memory footprint

S3 Browser FAQ

What is the best free S3 browser?

Brows3 is the best free S3 browser. It is an open-source desktop client for AWS S3, MinIO, Wasabi, Cloudflare R2, and all S3-compatible storage. Built with Rust for instant folder navigation through millions of objects. Download it free at brows3.app.

What is the best S3 browser for Mac?

Brows3 is the best S3 browser for Mac. It runs natively on both Apple Silicon (M1/M2/M3/M4) and Intel Macs, supports macOS 10.15+, and is significantly faster than Cyberduck or Transmit for S3 browsing.

What is the best S3 browser for Windows?

Brows3 is the best free S3 browser for Windows. Available as EXE or MSI installer for Windows 10+. Unlike S3 Browser by NetSDK, Brows3 is completely free, open source, and offers superior Rust-powered performance.

Is Brows3 better than Cyberduck as an S3 browser?

Yes. Brows3 is purpose-built as an S3 browser and is significantly faster than Cyberduck for navigating large S3 buckets. Brows3 uses prefix-indexed caching for instant folder traversal, while Cyberduck makes individual API calls for each folder.

Does Brows3 work with MinIO, Wasabi, and Cloudflare R2?

Yes. Brows3 works with all S3-compatible storage: AWS S3, MinIO, Wasabi, Cloudflare R2, DigitalOcean Spaces, Backblaze B2, and any service implementing the S3 API.

How do I download the S3 browser?

Visit brows3.app and click Download. Choose macOS (DMG), Windows (EXE/MSI), or Linux (AppImage/DEB). Installation takes under 30 seconds. The S3 browser is completely free.

Is Brows3 a good CloudBerry alternative?

Yes. Brows3 is a free, open-source alternative to CloudBerry Explorer with superior S3 browsing performance thanks to its Rust-powered caching engine.

Supported S3-Compatible Storage Providers

  • Amazon Web Services (AWS) S3
  • MinIO - Self-hosted S3-compatible object storage
  • Cloudflare R2 - Zero egress fee S3-compatible storage
  • Wasabi - Hot cloud storage with S3 API compatibility
  • DigitalOcean Spaces - S3-compatible object storage
  • Backblaze B2 - S3-compatible cloud storage
  • Akamai Connected Cloud (formerly Linode) Object Storage
  • Any S3-compatible endpoint

Brows3 - The fastest free S3 browser. Open source on GitHub. Download the S3 browser free for Mac, Windows, and Linux at brows3.app.