Persistent Sessions
Never lose your working state again. Run long build scripts, dev servers, or SSH sessions without worrying about network drops or closed laptops.
Open Source Legacy
Empowering Developers & Terminal Workflows
tmux (terminal multiplexer) lets you switch easily between several programs in one terminal, detach them, and reattach them later to a different terminal window.
Flexible Window Splitting
Divide single terminal windows into arbitrary horizontal and vertical panes. Monitor logs, run tests, and write code side-by-side.
Extensible Ecosystem
Customizable via .tmux.conf and extensible using TPM (tmux plugin manager) with custom status bars, theme presets, and keybindings.
The Story of tmux
From an OpenBSD project in 2007 to the world's standard terminal multiplexer.
2007
Created by Nicholas Marriott
tmux was created in 2007 by Nicholas Marriott as a modern, clean, BSD-licensed alternative to older multiplexers like GNU Screen.
2009 — 2015
OpenBSD & Universal Adoption
Imported into OpenBSD base system and adopted by Linux distributions and macOS (via Homebrew) as the primary terminal multiplexer.
2016 — Present
The Developer Standard
With mouse support, modern color support (truecolor/256-color), and rich scripting, tmux remains the gold standard for developers worldwide.
Editorial Standards & Maintainer Mission
How we ensure accurate, verified, and practical documentation on tmux.app.
Testing & Verification
Multi-Platform Testing
Every command, configuration option, and shell script featured on tmux.app is tested on real environments: Ubuntu/Debian (Linux), macOS Sequoia (Homebrew), and Windows 11 (WSL2) against stable tmux releases.
Editorial Independence
Independent & Free
tmux.app is an independent community documentation platform. Our tutorials and cheat sheets are published under the ISC license and remain completely free for developers, sysadmins, and students worldwide.
Community Feedback
Continuous Updates
We actively monitor tmux release notes, kernel updates, and modern developer tooling (Ghostty, Claude Code, iTerm2, Neovim) to keep our documentation current. Readers can reach our team directly at our Contact page.
Editorial Review & Errata Correction Policy
Maintaining high technical accuracy through continuous verification and community contributions.
1. Upstream Git Tracking
Our team tracks the official upstream tmux repository (tmux/tmux) commits and release tags. When new options, syntax changes, or deprecations occur (such as keybinding syntax transitions), tutorials and reference pages are updated within 48 hours of release.
2. Errata & Correction Turnaround
Technical errors reported through our contact portal are reviewed against our verification lab nodes within 24 business hours. Verified corrections are deployed immediately with changelog updates.
3. Reproducible Technical Examples
We mandate that every shell snippet, configuration line, and terminal keybinding published on the site is self-contained and reproducible without requiring undocumented external dependencies.
Our Multi-Platform Verification Lab
We rigorously test every configuration, keybinding, and script against active reference environments:
🍎 macOS Testing Node
OS: macOS 15.0 Sequoia & 14.5 Sonoma (Apple Silicon M2 / M3)
Terminals: Ghostty, iTerm2, Alacritty, Terminal.app
tmux: Homebrew tmux v3.6a
🐧 Linux Server & Desktop Node
OS: Ubuntu 24.04 LTS (Noble Numbat), Debian 12 (Bookworm)
Display Servers: Wayland (wl-clipboard) & X11 (xclip)
tmux: APT & Source Build v3.6a
🪟 Windows WSL2 Node
OS: Windows 11 Pro (WSL2 Linux 6.6 Kernel)
Terminals: Windows Terminal v1.21, WezTerm
tmux: Ubuntu on WSL v3.6a
Join the Community
tmux.app is dedicated to helping engineers master terminal productivity. Explore our technical documentation, try the interactive config generator, or check out our installation guides.