Regex — a native macOS scratchpad for Swift Regex

I made Regex to test Swift Regex patterns while keeping sample text on my Mac. Paste the text, type a pattern, and Regex shows empty, invalid, zero-match, and matching states as I type. It highlights every match or one capture group from 0–8. I can toggle the i, s, and m matching options, preview $0–$8 replacements without changing the pasted text, and copy or paste escaped patterns. Patterns, test data, and replacement previews stay in the app. Regex has no uploads, account, cloud sync, ne...