Brows3 is a high-performance, open-source Amazon S3 desktop client designed for developers who demand speed and efficiency. Built with Rust and Tauri, Brows3 addresses the limitations of traditional S3 browsers by offering instant navigation through its prefix-indexed caching architecture. This makes navigating buckets with millions of objects as fast as browsing a local file system.
Key Features:
Smart Indexing: Instant folder traversal after an initial index, eliminating delays when exploring deep directory structures.
Background Syncing: Local cache updates happen seamlessly in the background, ensuring your view is always synchronized without interruptions.
Deep Search: Perform instant searches across entire buckets, even with massive datasets, for quick access to files.
Bulk Operations: Efficiently upload, download, and delete multiple files or folders at once, streamlining workflow processes.
Media Previews & Editing: Native support for images, videos, PDFs, and rich text editing directly in the client.
Audience & Benefit:
Ideal for developers, DevOps teams, and organizations managing large S3 buckets. Brows3 provides faster workflows, increased efficiency, and seamless integration with AWS environments, empowering users to work smarter without compromising on performance. It can be installed via winget for easy setup across supported platforms.
README
Brows3
Brows3 is a high-performance, open-source Amazon S3 desktop client designed for developers who demand speed. Built with a Rust core and a Tauri-powered frontend, Brows3 solves the "slow listing" problem of traditional S3 browsers through its unique prefix-indexed caching architecture.
Navigating through buckets with millions of objects is now as fast as browsing your local file system.
Why Brows3?
Traditional S3 tools often suffer from latency when navigating deep folder structures or listing large numbers of objects. Brows3 rethinks the browsing experience:
Instant Navigation: After an initial index, folder traversal happens instantly. No more waiting for "Loading..." spinners when clicking through directories.
Deep Search: Perform instant, localized searches across your entire bucket. Find any file in milliseconds, even in massive datasets.
Intelligent Background Indexing: Brows3 populates its local cache in the background while you work, ensuring your view is always synchronized without blocking your interaction.
Hyper-Virtuoso Table: Our custom-tuned virtualization engine handles lists of 100,000+ items with silky-smooth scrolling at 60fps.
Feature Deep Dive
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.
Rich Previews & Editing
Built-in Editor: Powered by Monaco (VS Code's Engine). Edit text, JSON, and code files directly in S3.
Direct Edit Action: Quick "Edit" button in the file list and context menu for instant code/text modifications.
Media Previews: Native support for high-resolution images, videos, and PDFs.
Rendering Indicators: Clear visual feedback for large image rendering states.
Feature Deep Dive
Speed & Performance
Rust-Powered Backend: Core logic is written in Rust for near-instant operations.
Smart In-Memory Caching:
Sub-millisecond navigation for recently visited folders.
Auto-Invalidation: Cache automatically refreshes after you upload, delete, or modify files.
30-Minute TTL: Stale data (from external sources) is automatically purged.
Lazy Loading: Efficiently handles buckets with millions of objects.
Enterprise & Restricted Access
Direct Bucket Access: Instantly navigate to specific buckets (e.g., s3://my-secure-bucket) even if you don't have 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.
In-App PDF Preview: View PDFs directly within the application with a high-performance native renderer. Features embedded search, standard PDF navigation, and focused reading mode.
Automatic Region Discovery: Profiles now automatically detect the correct AWS region from system configurations, enabling zero-config setup.
Smart Tab Management: Intelligent tab deduplication ensures you never have multiple tabs open for the same S3 path—automatically switching to existing tabs when searching.
Deep Recursive Search: Overhauled with 5x more depth and context-awareness. Search recursively within specific folders with auto-region retry support.
System Monitor: Real-time visibility into application performance. Track API request success/failure rates and view live logs for debugging.
Profile-Gated Access: Create isolated profiles for different AWS accounts or environments. Switch contexts instantly with zero friction.
Enhanced Settings:
Manage application data, clear cache, and check for updates manually.
One-click theme switching (Dark/Light/System).
Configure default regions and concurrency limits.
Auto-Updates: Seamless background updates ensure you're always on the latest secure version.
Technical Architecture
Brows3 leverages a tiered data strategy to achieve its performance:
Rust Core (The Muscle): Handles all heavy-lift S3 networking, credential management, and local indexing using high-speed concurrency.
Prefix-Indexed Tree: An in-memory data structure that organizes S3's flat object list into a hierarchical tree, enabling instant directory lookup.
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.
SSG React (The UI): A Next.js-based frontend exported as a static site, providing the smallest possible memory footprint.
Installation
Brows3 is available for all major desktop platforms. Download the latest version from the Releases page.
Platform
Installer Type
macOS
.dmg (Silicon/Intel), .app.tar.gz
Windows
.msi, .exe
Linux
.deb, .AppImage
Manual Build
If you prefer building from source, follow the instructions for your platform:
Prerequisites (All Platforms)
Node.js v20+ and pnpm (install via npm install -g pnpm)
git clone https://github.com/rgcsekaraa/brows3.git
cd brows3
pnpm install
pnpm tauri dev
Release Build (All Platforms)
pnpm tauri build
Troubleshooting (macOS)
If you see the error "Brows3.app is damaged and can't be opened" after downloading:
Brows3 is a free, open-source project and is not yet signed with a paid Apple Developer certificate. You can easily fix this by running one command in your Terminal:
