Regex Tester
How to Test Regular Expressions Locally on your Mac
Regex test input often comes from logs, customer text, filenames or private validation rules. CodeSwissKnife lets you test regular expressions locally with live highlighting and replacement preview.
Why test regex locally?
Sample text can contain private data. A local regex tester keeps the pattern and test corpus in your workspace.
See matches as you type
Live matching helps you understand whether a pattern catches the intended text before it reaches validation code or a script.
Preview replacements safely
Use replacement preview to check transformations before copying a regex into code, data cleanup or migration work.
Use Regex Tester offline on macOS
Download CodeSwissKnife to keep this inspector or debugger and the rest of your developer workflow tools local on your Mac.