Regex tester
Pattern
Input
                        [ERROR 

Text

                        [ERROR 
Options
Replacement
Click the context tab to see replacements.
1 match found in about 2 milliseconds.
IndexPositionMatched String$1
00 [ERROR

Text

[E


Text

                        [ERROR 
​
​Text
​
​                        [ERROR 
  1. empty string


  2. Text

  3. RROR