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Regex Find and Replace Online

Run regular-expression find and replace with custom flags and capture-group backreferences such as $1. Batch text cleanup stays in your browser.

Quick switch→Regex Tester
RegexReplaceText
Quick switch:Regex TesterRegex ExtractorRemove Duplicate Lines

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Use cases

  • Normalize date formats in bulk
  • Mask sensitive values in logs
  • Rewrite repeated template fragments

How to use

  1. Enter the pattern, replacement, and flags
  2. Paste the source text
  3. Select Replace, then copy the result

Example input and output

Pattern / replacement / text

\d+ → [N] / abc 123 def 456

Output

abc [N] def [N]

FAQ

Are capture-group references supported?

Yes. Use $1, $2, and similar backreferences in the replacement string.

Is the text uploaded?

No. Replacement runs locally in your browser.

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