Find and Replace Text

Find and replace text or regex patterns in real-time. Supports capture groups, case sensitivity, whole word matching, match counting, and catastrophic backtracking protection.

Private • In-browser processing • Zero server uploads

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How to Use Find and Replace Text

1
Paste Your Content
Insert source text into the left input panel.
2
Configure Search Terms
Enter what to find and what to replace it with. Toggle Regex, Case Sensitivity, or Whole Word modes.
3
Review and Copy
The live preview instantly reflects all replacements and match totals.

Key Features

100% In-Browser
All replacements happen locally in memory with zero network requests.
Regex & Plain Text
Full regular expression support with $1, $2 capture group backreferences.
Whole Word Matching
Isolate search terms without accidentally altering partial substrings.
Catastrophic Backtracking Guard
Built-in safety checks prevent browser freezes from malformed regexes.

Common Use Cases

  • Refactoring variable names, URLs, and configuration keys across code blocks.
  • Swapping date formats or name orders using regex capture groups.
  • Batch sanitizing documents, anonymizing names, and removing placeholder text.
  • Standardizing spelling or punctuation styles across manuscript drafts.

Frequently Asked Questions

Yes! When Regular Expression mode is enabled, any parentheses groups (e.g. (\w+)) can be referenced in the replacement box using $1, $2, etc.

No. The engine detects nested quantifier patterns that cause catastrophic exponential backtracking and halts them before execution.

The engine easily processes megabytes of text in milliseconds within your browser sandbox.

Reverse Text
Reverse any text by characters, words or lines — instant live preview.
Add Prefix to Text Lines
Prepend a custom string to every line in a block of text.
Rewrite Text
Transform text case: uppercase, lowercase, title case, sentence case, camelCase.
Sort a List
Sort a list of items alphabetically, numerically or by length — asc or desc.
Join Multiple Strings
Join multiple strings with a custom separator, prefix and suffix.