About Find and Replace Tool
Our free online find and replace tool allows you to search for text patterns and replace them instantly. Whether you need simple text replacements or advanced regex pattern matching, this tool handles it all with 100% client-side processing for maximum privacy and security.
Key Features
- ✓ Regex Support: Use powerful regular expressions for complex pattern matching
- ✓ Case-Sensitive Search: Toggle case sensitivity for precise or flexible matching
- ✓ Whole Word Matching: Match complete words only, not partial matches
- ✓ Replace All or First: Replace every occurrence or just the first match
- ✓ Multi-line Support: Search across multiple lines with ease
- ✓ Instant Preview: See results immediately as you type
- ✓ 100% Private: All processing happens in your browser
- ✓ No Limits: Process unlimited text with no file size restrictions
Common Use Cases
🔧 Code Refactoring
Rename variables, functions, or class names across your codebase. Use regex to match specific patterns like variable naming conventions.
Example: Find oldVariableName → Replace with newVariableName
📝 Content Editing
Update URLs, fix spelling errors, or standardize terminology across large documents. Perfect for writers and editors.
🔍 Data Cleaning
Remove unwanted characters, standardize formatting, or clean up CSV and JSON data. Use regex for complex data transformations.
🌐 URL Updates
Batch update URLs in markdown files, HTML, or documentation when migrating domains or restructuring websites.
Regex Pattern Examples
| Pattern | Matches | Use Case |
|---|---|---|
\\d+ | Any number sequence | Find all numbers |
[a-z]+@[a-z]+\\.[a-z]+ | Email addresses | Extract or replace emails |
https?://[^\\s]+ | HTTP/HTTPS URLs | Find all web links |
\\b\\w4\\b | 4-letter words | Match specific word lengths |
^.*error.*$ | Lines containing "error" | Find error messages in logs |
How to Use Find and Replace
- 1. Paste your text into the input field or type/import it
- 2. Enter search pattern: Type the text or regex pattern you want to find
- 3. Select options: Choose case-sensitive, whole word, or regex mode
- 4. Enter replacement: Type what you want to replace the matches with
- 5. Replace: Click "Replace All" or "Replace First" to perform the operation
- 6. Review & copy: Check the result and copy to clipboard or download
🔒 Privacy & Security
All text processing happens locally in your browser using JavaScript. Your text never leaves your device, is not sent to any server, and is not stored anywhere. This ensures complete privacy and security for sensitive data.
Frequently Asked Questions
Does this tool support regular expressions (regex)?
Yes! Our find and replace tool supports full regular expression (regex) patterns. You can use regex patterns like \\d+ for numbers, [a-z]+ for lowercase letters, or complex patterns with capturing groups. Enable regex mode with the checkbox option.
Is my text data safe when using this tool?
Absolutely safe. All text processing happens locally in your browser using client-side JavaScript. Your text never leaves your device and is not sent to any server or stored anywhere.
Can I replace multiple different terms at once?
Currently, each find-replace operation handles one pattern at a time. However, you can perform multiple consecutive replacements quickly since the process is instant. For complex multi-pattern replacements, use regex with alternation like (pattern1|pattern2|pattern3).
What's the difference between "Replace All" and "Replace First"?
"Replace All" replaces every occurrence of the search pattern throughout your entire text, while "Replace First" only replaces the first match found. Use "Replace First" when you want to preview changes incrementally.
How do I use case-sensitive search?
Enable the "Case Sensitive" checkbox option. When enabled, "Hello" and "hello" will be treated as different strings. When disabled, both will match.
What is whole word matching?
Whole word matching ensures that your search pattern only matches complete words, not partial matches within larger words. For example, searching for "cat" with whole word enabled won't match "category" or "concatenate".
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