Find and ReplaceFind and replace text with support for regex, case sensitivity, and bulk operations.
Find and Replace
Find and replace text with support for regex, case sensitivity, and bulk operations.
Enter Your Text
Paste the text in which you want to find and replace content.
Set Search & Replace
Enter what to find and what to replace it with. Toggle regex and case-sensitivity options.
View Results
See all replacements applied instantly in the output. Copy the result when satisfied.
What Is Find and Replace?
Find and Replace is a powerful text editing tool that searches for specific text patterns and replaces them with new content. Unlike simple find-replace in text editors, this tool supports regular expressions (regex) for advanced pattern matching, optional case-sensitive searching, and processes the entire text at once for bulk operations. It's invaluable for batch text editing, data cleaning, code refactoring, and content management tasks where you need to make the same change across a large block of text.
Why Use Our Find and Replace?
- Regex support for powerful pattern matching
- Toggle case-sensitive or case-insensitive searching
- Replace all occurrences simultaneously
- Preview results before committing changes
- Handles large text inputs efficiently
Common Use Cases
Data Cleaning
Replace inconsistent formatting, fix typos, or normalize data across large text datasets.
Code Refactoring
Rename variables, functions, or class names across code snippets using regex patterns.
Content Editing
Update product names, URLs, or terminology across documentation or marketing copy.
Format Conversion
Use regex to transform data formats, like converting dates from MM/DD/YYYY to YYYY-MM-DD.
Technical Guide
The tool performs text substitution using JavaScript's String.replace() method with either literal strings or regular expressions. In literal mode, the search term is escaped to prevent regex special characters from being interpreted as patterns. The global flag (g) ensures all occurrences are replaced, not just the first. In regex mode, the user's pattern is compiled into a RegExp object with the global flag and optionally the case-insensitive flag (i). Error handling catches invalid regex patterns and displays a friendly error message. The replacement string supports regex backreferences ($1, $2, etc.) in regex mode for capturing group substitutions.
Tips & Best Practices
- 1Enable regex mode for pattern-based replacements like date format conversion
- 2Use \b in regex to match whole words only: \bcat\b won't match "category"
- 3Leave the replace field empty to delete all matches
- 4In regex mode, use $1, $2 for capturing group backreferences
- 5Test with a small sample first before running on large texts
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Text ToolsFrequently Asked Questions
QWhat is regex mode?
QDoes it replace all occurrences?
QWhat if my regex pattern is invalid?
QCan I use capture groups?
QIs the search case-sensitive?
About Find and Replace
Find and Replace is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.