Regular Expression Bulk Replace Tool

Find and replace text using regular expressions with capture group support

Input Text

Characters: 44 | Lines: 3

Pattern & Replacement

Regular Expression Pattern

Replacement String

Use $1, $2, etc. for capture groups, $& for full match

Flags

Global

All matches

Ignore Case

Case insensitive

Multiline

^ and $ match line breaks

Examples

Capture Groups

• $1, $2... - Capture group references
• $& - Full match
• $` - Before match
• $' - After match
• () - Capturing group
• (?:) - Non-capturing group

Output

Characters: 0 | Lines: 1

Regex Pattern

/Hello (\w+)/g

Common Patterns

\d - Digit
\w - Word character
\s - Whitespace
[a-z] - Lowercase letter
+ - One or more
* - Zero or more
? - Zero or one
^ - Start of line
$ - End of line

Use Cases

• Text formatting and cleanup
• Data transformation
• Code refactoring
• Log file processing
• Batch text editing