Regex TUI

A terminal user interface (TUI) application for testing and visualizing regular expressions in real-time.

Features

• Interactive regex editor with live validation
• RE2 engine by default; regexp2 option with partial PCRE compatibility
• Multi-line text input for testing
• Visual highlighting of regex matches with alternating colors
• Whitespace visualization: spaces (·) and line breaks (↵) are displayed as visible glyphs
• Real-time feedback as you type the expression
• Clean and intuitive terminal interface
• Tab navigation between regex and text inputs
• Options dialog for toggling global and case-insensitive flags

Demo

Installation

Using go install

The simplest way to install regex-tui is using go install:

go install github.com/vitor-mariano/regex-tui@latest

This will install the binary to your $HOME/go/bin directory. Make sure this directory is in your PATH.

Arch Linux

regex-rui is available on Arch Linux through AUR. You can use yay or any other AUR helper you prefer:

yay -S regex-tui

Manual Installation with Make

Clone the repository and use Make to build and install:

git clone https://github.com/vitor-mariano/regex-tui.git
cd regex-tui
make install

This will compile the application and install it to $GOPATH/bin/regex-tui.

Requirements

• Go 1.25 or later

Usage

Simply run the command:

regex-tui