New Fluxzy Desktop now ships an MCP server. Let Claude Code, Cursor or Codex search your captured traffic, explain failures and write rules, all on your machine. Learn more

Download Fluxzy - Free Community Edition

Free, open-source HTTP/HTTPS debugging proxy for Windows, macOS, and Linux. Capture and inspect traffic, decrypt TLS, set breakpoints, and mock APIs.

Fluxzy Desktop

Full-featured HTTP debugger and network analyzer

Select your platform from the options below

Signed binaries Open source engine Free forever
Source code

Linux: install with your package manager

Signed apt and rpm repository, updates delivered by apt upgrade / dnf upgrade

curl -fsSL https://packages.fluxzy.io/install.sh | sh
Debian, Ubuntu, Mint, Pop!_OS
sudo curl -fsSLo /usr/share/keyrings/fluxzy-archive-keyring.gpg https://packages.fluxzy.io/fluxzy-archive-keyring.gpg
sudo curl -fsSLo /etc/apt/sources.list.d/fluxzy.sources https://packages.fluxzy.io/fluxzy.sources
sudo apt update && sudo apt install fluxzy-desktop
Fedora, RHEL, Rocky, Alma, openSUSE
sudo curl -fsSLo /etc/yum.repos.d/fluxzy.repo https://packages.fluxzy.io/fluxzy.repo
sudo dnf install fluxzy-desktop
GPG-signed packages and metadata Updates with the rest of your system The .deb and .rpm below register the repository too
OS / Environment Installer Standalone
Windows 7/10/11 x64 v2.5.8 .exe (60.8 MB) v2.5.8 .zip (82.79 MB)
macOS (Intel) v2.5.8 .dmg (69.03 MB) -
macOS (Apple Silicon) v2.5.8 .dmg (65.86 MB) -
Debian based Linux x64 v2.5.8 .deb 1 (82.74 MB) v2.5.8 .AppImage (152.2 MB)
Red Hat based Linux x64 v2.5.8 .rpm 2 (82.76 MB) v2.5.8 .AppImage (152.2 MB)

1 .deb packages are for Debian-based distributions (Ubuntu, Mint, etc.) and register the Fluxzy apt repository for updates
2 .rpm packages are for Red Hat-based distributions (Fedora, CentOS, etc.) and register the Fluxzy rpm repository for updates

End-user system requirements

Resource Requirement
OS macOS 10.13+, Windows 10+ (x64), Linux x64 with WebKitGTK
Disk space ~300 MB
Memory (RAM) 4 GB
Display At least 1170 x 740 px window (default 1280 x 800).

Fluxzy CLI

Command-line HTTP debugging tool. Capture traffic, apply rules, and automate network analysis from your terminal.

Recommended for your system
Docker
docker run -it -p 44344:44344 fluxzy/fluxzy:latest --help
No installation required Isolated environment Cross-platform
Homebrew
brew tap haga-rak/fluxzy && brew install fluxzy
Auto-updates Easy uninstall PATH configured
Winget
winget install Fluxzy.Fluxzy
Official Windows package manager Auto-updates PATH configured
npm
npm install -g @fluxzy/cli
Cross-platform Easy updates via npm No sudo required

Other installation methods

Docker
Run in container
Winget
Windows
Homebrew
macOS
npm
Cross-platform
GitHub
Releases
Standalone
ZIP binaries

Docker Installation

Run Fluxzy CLI in a lightweight container from Docker Hub.

docker run -it -p 44344:44344 fluxzy/fluxzy:latest --help

Winget Installation (Windows)

Install using the Windows Package Manager.

winget install Fluxzy.Fluxzy

Homebrew Installation (macOS)

Install using Homebrew, the missing package manager for macOS.

brew tap haga-rak/fluxzy && brew install fluxzy

npm Installation

Install the Fluxzy CLI globally via npm. Works on Windows, Linux, and macOS.

npm install -g @fluxzy/cli

Requires Node.js 16 or later.

GitHub Releases

Download the latest stable releases directly from the GitHub repository.

View Releases on GitHub

Standalone Binaries

Download and extract the ZIP file for your platform. No installation required.

Available Downloads

Platform Download
Windows 32-bits v1.39.50.33872 fluxzy-cli-1.39.50.33872-win-x86.zip (38 MB)
Windows 64-bits v1.39.50.33872 fluxzy-cli-1.39.50.33872-win-x64.zip (40 MB)
Windows ARM64 v1.39.50.33872 fluxzy-cli-1.39.50.33872-win-arm64.zip (39 MB)
Linux 64-bits v1.39.50.33872 fluxzy-cli-1.39.50.33872-linux-x64.tar.gz (40 MB)
Linux ARM64 v1.39.50.33872 fluxzy-cli-1.39.50.33872-linux-arm64.tar.gz (38 MB)
macOS Intel 64-bits v1.39.48.18975 fluxzy-cli-1.39.48.18975-osx-x64.tar.gz (39 MB)
macOS Apple Silicon v1.39.48.18975 fluxzy-cli-1.39.48.18975-osx-arm64.tar.gz (37 MB)
CLI Documentation

.NET Packages

Integrate Fluxzy into your .NET applications. Available on NuGet for .NET Standard 2.1, .NET 6, and .NET 8.

Official NuGet packages provide full access to the Fluxzy engine for traffic capture, modification, and analysis in your own applications.

Package Version
Fluxzy.Core v1.39.50 netstandard2.1, net6, net8
Fluxzy.Core.Pcap v1.39.50 netstandard2.1, net6, net8

Official packages are signed by Fluxzy SAS

.NET Documentation Source Code

Frequently Asked Questions

Yes. Fluxzy is free and fully unlocked for personal use, with every feature available at no cost. The engine is open source, and the desktop app, CLI, and .NET packages can all be downloaded for free.

Fluxzy runs on Windows (7, 10, and 11 x64), macOS (both Intel and Apple Silicon), and Linux (apt and rpm repositories, .deb, .rpm, and AppImage). The CLI and .NET packages are fully cross-platform.

The quickest way is the package repository: run curl -fsSL https://packages.fluxzy.io/install.sh | sh, which registers the signed apt repository and installs fluxzy-desktop. You can also download the .deb file from the table above and install it from the folder it was saved in with sudo apt install ./Fluxzy.Desktop_*.deb; the package registers the repository as well. This covers Debian, Ubuntu, Linux Mint, Pop!_OS, and other Debian-based distributions.

Run curl -fsSL https://packages.fluxzy.io/install.sh | sh: it registers the signed rpm repository and installs fluxzy-desktop with dnf or zypper. Alternatively, download the .rpm file from the table above and install it with sudo dnf install ./Fluxzy.Desktop-*.rpm (or sudo zypper install on openSUSE); the package registers the repository as well. This covers Fedora, RHEL, CentOS Stream, Rocky Linux, AlmaLinux and openSUSE.

Through your package manager. Both the .deb and the .rpm register the Fluxzy package repository (packages.fluxzy.io) and its signing key, so sudo apt upgrade or sudo dnf upgrade picks up new releases alongside the rest of your system. The AppImage is self-contained and updates itself from within the application instead.

Every binary is published with a cryptographic checksum: SHA-256 for the desktop app and SHA-512 for the CLI. Click the fingerprint icon next to any download to copy its hash, then compare it against the file you downloaded. Desktop installers are also code-signed.

Yes. Windows installers and executables are code-signed with an Authenticode certificate, and macOS builds are signed and notarized by Apple. This means they run without SmartScreen or Gatekeeper warnings, and your operating system can confirm the binaries come from a verified publisher and have not been tampered with.

Use Fluxzy Desktop for an interactive interface to capture, inspect, and edit traffic. Use the CLI to automate captures, apply rules in scripts, or run Fluxzy on servers and in CI pipelines. Both share the same engine, so capture files are interchangeable.

Yes. The Fluxzy engine is open source and available on GitHub. You can review the code, build it from source, or embed it directly in your own .NET applications through the official NuGet packages.

Pick the method that fits your system: winget on Windows, Homebrew on macOS, npm or Docker for any platform, or a standalone binary. This page automatically recommends the best option for your detected operating system.