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Regex Replace

Find and replace text using regular expressions with capture group references, configurable flags, and match highlighting. Runs entirely in your browser — your data never leaves your machine.

regex replace find search text pattern

Published May 30, 2026

All interactive tools run entirely in your browser. Your data never leaves your device.

How It Works

Enter your input text, a regex pattern, and a replacement string. The tool applies the regex and shows the result with match details.

Features

  • Regex pattern matching: full JavaScript regex syntax support
  • Capture group references: use $1, $2, $& in replacements
  • Configurable flags: global, case-insensitive, multiline, dotall, unicode
  • Match details: shows each match with position and captured groups
  • 5 examples: email masking, date format conversion, camelCase to kebab-case, HTML stripping, word wrapping
  • Private: runs entirely in the browser — no data transmitted

Use Cases

  • Bulk text transformations with pattern matching
  • Data format conversion (dates, names, identifiers)
  • Code refactoring with regex-based search and replace
  • Sanitizing or masking sensitive data
  • Learning regex with immediate visual feedback