Regex Pattern Matcher & Replacer

Enter a regex pattern + flags, preview matches (and groups), then preview or apply replacements.

Pattern explanation (basic)
  • \b — Word boundary
  • \w — Word character (letter, digit, underscore)
  • . — Any character (except newline unless dotall /s)
  • + — One or more
Current flags: gi
What do these flags do?
  • g — Global: Find all matches (not just the first).
  • i — Ignore case: Case-insensitive matching.
  • m — Multiline: ^ and $ match start/end of each line.
  • s — Dotall: . matches newlines too.
  • u — Unicode: Enable full Unicode matching semantics.

Input Text

Size: 0.1 KB

Match Preview

Total matches: 0
No matches found
The email is john@example.com His work is jane@work.org Contact: support@txtutils.net

Captured Groups (active match)

—

Replacement

Available backreferences
  • $& — entire match
  • $` — text before match
  • $' — text after match
  • $1, $2, ... — capture groups
  • $<name> — named group (if present)
  • $$ — literal $

Output

Replaced count (preview): 0