🔄 Text Replacement Tool

Multiple search/replace pairs can be set to batch replace text. Regular expressions are also supported.

search-and-replace pair

option

Usage and Application Examples

  • Batch renaming of variable and class names in code
  • Change the delimiter character for CSV data (e.g., comma to tab)
  • Batch deletion and conversion of HTML tags
  • Uniform formatting of phone numbers and e-mail addresses with regular expressions
  • Terminology unification in translation work (batch replacement in multiple pairs)

What is Text Replacer?

Text Replacer performs multiple find-and-replace operations simultaneously, saving time compared to one-at-a-time replacements in text editors. It supports regular expressions for complex pattern matching, case-sensitive filtering, and batch replacements across entire documents. Perfect for developers, writers, and data processors handling bulk text modifications efficiently and accurately.

How to Use

Enter your text in the main area. In the find-replace pairs section, specify what to find and what to replace it with. You can add multiple pairs and execute all replacements at once through the interface. Enable "Case Sensitive" if exact casing matters—for instance, replacing "Log" differently from "log" in code. Enable "Regular Expression" mode for pattern-based replacements using regex syntax, like matching all email addresses or URL patterns. Click "Replace All" to apply all rules simultaneously across your entire text. Review the result and copy it when satisfied with the changes.

Use Cases

• Data cleanup converting inconsistent naming conventions across hundreds or thousands of entries
• Developers refactoring variable names across code snippets, configuration files, or documentation
• Writers standardizing em-dashes, quote styles, spacing, and formatting throughout long manuscripts
• Translators batch-updating terminology that was mistranslated consistently across documents
• System administrators cleaning log files by removing sensitive patterns, timestamps, or repeated errors with regex patterns

Tips & Insights

Regular expressions unlock advanced replacements—\d+ finds all numbers, \w+@\w+\.\w+ matches email patterns precisely. Backreferences like $1 in replacements let you rearrange matched groups, useful for reformatting data completely. Test each regex on a small sample first to avoid unintended replacements across your entire document. Case-sensitive mode is crucial when variable names differ only in capitalization. Multiple replacements execute in order specified, so arrange them thoughtfully when later rules depend on earlier replacements completing.

Frequently Asked Questions

How do I use the text replacement tool?

Simply enter text in the input text area, set a pair of search and replace strings, and press the "Replace" button. You can also add multiple pairs and replace them all at once.

Can I use regular expressions?

Yes, the "Use regular expression" option is turned on. If the "Use regular expression" option is checked, the search string is treated as a regular expression pattern. Capture groups ($1, $2, etc.) can also be used in the replacement string.

Can I run multiple replacements at the same time?

Yes, you can add multiple search/replace pairs by clicking on the "Add Pair" button. Multiple search/replace pairs can be added using the "Add Pair" button, and all pairs are applied at once, starting from the top.

Can I use case-insensitive substitution?

Yes. Uncheck the "case sensitive" option to perform case-insensitive search and replace.

Can I copy the replacement result?

Yes, you can copy the results to the clipboard by clicking the "Copy Results" button below the output area. You can copy the replacement result to the clipboard by clicking the "Copy Result" button below the output area.

Can I swap inputs and outputs?

Yes. The "Replace Input/Output" button moves the output result to the input text area. This is useful when you want to perform continuous replacement operations.

Can I preview the replacements before applying them?

Yes, the tool highlights all matches it will replace with a preview of the replacement text. You can verify the changes look correct before confirming the final replacement.

What regex special characters are supported?

The tool supports standard regex syntax including character classes ([a-z]), quantifiers (+, *, ?), anchors (^, $), and groups ((...)). Escaped characters like \s and \d for whitespace and digits are also supported.

Can I undo replacements if I make a mistake?

The browser's undo function (Ctrl+Z) may not work after you've left the tool, so it's recommended to keep the original text or work with a copy. Always test replacements carefully before applying them to important content.

How do I escape special characters in my search terms?

To search for literal special characters like $, *, or ?, prefix them with a backslash (\). For example, use \$ to search for a dollar sign instead of a regex anchor.

Is there a limit to how many replacement pairs I can add?

You can add as many replacement pairs as needed—the tool will process them sequentially in the order you define. However, replacements later in the list will apply to results from earlier replacements.

Can I save or load replacement patterns for future use?

The tool doesn't have built-in saving, but you can keep a text file with your regex patterns and manually paste them in. Some browsers allow localStorage to persist your patterns across sessions.