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Regex tester, cheat sheet & reference - test patterns instantly
Pocket Regex is the ultimate regex tool for developers, engineers, and anyone who works with text patterns. Write, test, and debug regular expressions in real time - no browser needed. Regex Tester • Live match highlighting as you type - see exactly what your pattern captures • Color-coded matches with position info [start-end] • Capture group breakdown - indexed and named groups • Find & Replace mode with live preview and $1 group substitution • Flag toggles: ignore case (i), multiline (m), dot-all (s), literal (x) • Copy all matches or the replaced result to clipboard • Save any pattern to your personal favourites Regex Cheat Sheet - 65+ patterns • Searchable library covering Email, URLs, Numbers, Dates, Validation, Code, Files, Security, and Advanced patterns • Categories: Email & Comms · URLs & Web · Numbers · Date & Time · Validation · Programming · Files & Paths · Security · Advanced • Tap "Test →" to load any pattern straight into the tester • Expandable cards show description, live example, tags, and default flags Favourites • Save and name your own patterns — persisted across sessions • Rename, delete, and reload saved patterns instantly Whether you're validating emails, scraping logs, writing parsers, or just learning regex - Pocket Regex has you covered.