Brows3

Brows3 is a high-performance, open-source Amazon S3 browser, S3 explorer, and 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.

Website: brows3.app

Brows3 is built for people searching for a fast S3 browser, AWS S3 client, S3 bucket explorer, S3 file manager, or S3-compatible storage browser for providers like MinIO, Cloudflare R2, Wasabi, and DigitalOcean Spaces.

Who It Is For

Brows3 is a strong fit if you need:

• a desktop S3 browser for large buckets
• a faster S3 explorer than generic cloud-storage tools
• an open-source S3 client for AWS S3 or S3-compatible storage
• a GUI for MinIO, Cloudflare R2, Wasabi, or DigitalOcean Spaces
• a developer-focused S3 file manager with editing, search, and transfer visibility

Why Brows3?

Traditional S3 tools often suffer from latency when navigating deep folder structures or listing large numbers of objects. If you are comparing tools like an S3 browser, S3 explorer, S3 GUI client, or desktop client for S3-compatible storage, 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.
• Presigned URL Sharing: Generate temporary object links with configurable expiry directly from the bucket view.

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.

• Persistent Secure Profiles: Manual and S3-compatible profiles survive restarts while secrets stay in the OS keychain instead of plain JSON.

• 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.

• Signed Release Pipeline: Release automation validates signing configuration and publishes updater metadata for desktop auto-update flows.

Technical Architecture

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.

Search Keywords

Brows3 is relevant if you are searching for:

• Amazon S3 browser
• S3 browser desktop app
• S3 client for macOS, Windows, and Linux
• S3 explorer
• S3 bucket browser
• AWS S3 desktop client
• S3-compatible storage browser
• MinIO browser
• Cloudflare R2 desktop client
• Wasabi browser
• DigitalOcean Spaces client
• object storage explorer

Alternatives And Comparisons

People often discover Brows3 while searching for:

• Cyberduck alternative for S3
• S3 Browser alternative
• open source S3 client
• fast S3 desktop client
• GUI client for Amazon S3
• MinIO desktop client
• R2 browser

Brows3 is focused on fast bucket navigation, deep search, and large-list performance rather than generic cloud-storage support across many unrelated providers.

If you are searching for...	Brows3 positioning
Cyberduck alternative for S3	More focused on S3/object-storage workflows and large bucket navigation
S3 Browser alternative	Cross-platform open-source desktop option with Rust/Tauri backend
MinIO client	Works for S3-compatible endpoints through Custom S3 mode
Cloudflare R2 browser	Relevant when using R2 through S3-compatible credentials
fast S3 desktop client	Core product focus is speed, indexing, and deep recursive search

GitHub Setup

To improve discoverability inside GitHub itself, set the repository description and topics in the repo settings.

Suggested repository description:

Fast open-source S3 browser, S3 explorer, and desktop client for Amazon S3, MinIO, Cloudflare R2, Wasabi, and other S3-compatible storage.

Suggested topics:

s3, amazon-s3, s3-browser, s3-client, s3-explorer, object-storage, minio, cloudflare-r2, wasabi, digitalocean-spaces, tauri, rust

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

Windows releases are configured to bundle the WebView2 runtime with the installer so fresh machines do not depend on a separate runtime download during installation.

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)
• 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 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 (if not already installed):

   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

Troubleshooting (macOS)

If you see the error "Brows3.app is damaged and can't be opened" after downloading:

This usually means the build was downloaded through a browser but was not notarized for Gatekeeper. First, drag Brows3.app into /Applications, launch it from /Applications, and eject the mounted DMG before deleting the installer. If Gatekeeper still blocks the app, run:

sudo xattr -rd com.apple.quarantine /Applications/Brows3.app

Releases can now use Apple signing/notarization credentials when configured in CI; unsigned community builds may still need the quarantine-removal step above. For more details, see our macOS Troubleshooting Guide and release signing setup guide.

Release Keys

For auto-updates to install correctly, the GitHub Actions secrets must include TAURI_SIGNING_PRIVATE_KEY and TAURI_SIGNING_PRIVATE_KEY_PASSWORD, and the matching public key must be present in src-tauri/tauri.conf.json. The exact GitHub path is:

Repository Settings -> Secrets and variables -> Actions

If you already added the secrets for Tauri, double-check that the secret names are exact and that the committed updater pubkey still matches the private key currently stored in GitHub.

Contributors

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

• Founder & Maintainer: rgcsekaraa
• Core Engineering: Brows3 Open Source Team

Want to become a contributor? Check out our Contributing Guide and join us in building the world's fastest S3 browser!

How to Contribute

1. Check the Issues: Look for "good first issue" labels.
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.

License

Distributed under the MIT License. See LICENSE for more information.

---

Created by rgcsekaraa. Built for the community.