Find and Replace

Replace words in text online: case handling, several replacements at once, and a check for each. With an option for all word forms.

Text

Find whole words only ? match case Cyrillic ё treated as е

More options all word forms (for Russian words) ? review each replacement ? multiple replacements at once regular expressions

"Find" is now a pattern, not a word. Word forms, "whole words only" and the ё/е option do not work in this mode: all of that goes into the pattern itself.

In the "Find" field

\d+ — a number
\s+ — runs of spaces and line breaks
. — any character, \. — a literal dot
[её] — either letter
(cat|dog) — either word

In the "Replace with" field

$1, $2 — what the first, second pair of parentheses captured
$& — the whole match
$$ — a literal dollar sign

Examples

(\d+) dollars → $1 USD: "100 dollars" becomes "100 USD"
(\d\d)\.(\d\d)\.(\d{4}) → $3-$2-$1: "11.09.2026" becomes "2026-09-11"
[ ]{2,} → one space: double spaces become single

The \b boundary works only with Latin letters. To match a whole Russian word, use (?.


  

  
    
      Result
      
    
    
    
    
      
    
    Press replace to restore the original word.





  

  

  

  
    
  

  
  
  
  
    The tool replaces a word or phrase throughout the text. Every replacement appears in the result right away, and the count is shown for each pair. Letter case carries over on its own: "Cat" becomes "Dog", and "CAT" becomes "DOG".
    

How to replace a word in all its forms
By default, only the exact form you type in gets replaced. To replace every form of the word, check the "all word forms" box and enter the word and its replacement in the base form. This works for Russian words: with «кот → пёс», «кота» becomes «пса» and «котами» becomes «псами». English words are replaced exactly as written, without changing their form. Below the replacement field you can see which forms were found.
  
  

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