wterm | Terminal Emulator for the Web

Introduction

A terminal emulator for the web<br>wterm ("dub-term") renders to the DOM — native text selection, copy/paste, find, and accessibility come for free. The core is written in Zig and compiled to WASM for near-native performance.

DefaultSolarizedMonokaiLight

wterm ("dub-term") renders to the DOM — native text selection, copy/paste, find, and accessibility come for free. The core is written in Zig and compiled to WASM for near-native performance.

Example uses just-bash. See also: SSH, local.

Features

Zig + WASM core — VT100/VT220/xterm escape sequence parser compiled to a ~12 KB .wasm binary

DOM rendering — native text selection, clipboard, browser find, screen reader support

Dirty-row tracking — only touched rows are re-rendered each frame via requestAnimationFrame

Themes — CSS custom properties with built-in Default, Solarized Dark, Monokai, and Light themes

Alternate screen buffer — vim, less, htop work correctly

Scrollback history — configurable ring buffer

24-bit color — full RGB SGR support

Auto-resize — ResizeObserver-based terminal resizing

WebSocket transport — connect to a PTY backend with reconnection

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