Find & Replace (with Regex)

Search and replace — with real regex power

Find and Replace is one of those tools you didn’t know you needed until the first time a text editor couldn’t handle your specific pattern. This version supports plain-string search for quick fixes and full JavaScript regular expressions for anything trickier.

What you can do

• Strip whitespace — pattern \s+ with empty replacement collapses all runs of whitespace.
• Mask sensitive data — pattern \b\d{16}\b with replacement ****-****-****-**** masks credit-card-like strings.
• Reformat logs — pattern ^\[(\d{4}-\d{2}-\d{2})\] (.+)$ with replacement $1: $2 reformats dated log lines.
• Swap word order — pattern (\w+), (\w+) with replacement $2 $1 flips “last, first” to “first last”.
• Normalize casing on matches — pair this with the Case Converter for multi-step transformations.

Flags supported

• Global (g) is always on. Every occurrence is replaced.
• Case-insensitive (i) — toggle to ignore letter case.
• Multiline (m) — toggle to make ^ and $ match at line breaks.

Privacy

Everything happens in your browser. The input, the pattern and the result never leave your device.