Find & Replace Tool

Search and replace text with powerful pattern matching. Support for regular expressions, case-sensitive matching, and bulk text operations.

Find & Replace Tool

4 matches found
4 replacements ready

Input Text

Replace Preview

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Contact us at support@mysite.org or call (555) 123-4567.
Visit our blog at https://mysite.org/blog for updates.
Our office hours are Monday-Friday, 9:00 AM - 5:00 PM.
You can also reach us at info@mysite.org.

Follow us on social media:
- Twitter: @example
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- LinkedIn: linkedin.com/company/example

Thank you for visiting mysite.org!

Powerful search and replace operations!

Find and replace text with regex support, preview changes, and bulk operations

Why Use Find & Replace?

Find and replace is one of the most fundamental text manipulation operations. It allows you to locate specific patterns in text and replace them with new content, making it invaluable for editing, data processing, and content transformation.

Common Use Cases

  • Content editing and proofreading
  • Data cleaning and standardization
  • Code refactoring and variable renaming
  • URL and link updating
  • Format conversion and normalization
  • Template customization
  • Batch text processing
  • Configuration file updates

Key Benefits

  • Time-saving bulk operations
  • Consistent text transformations
  • Error reduction in manual editing
  • Pattern-based replacements
  • Case-sensitive control
  • Preview before applying changes
  • Undo and revision tracking
  • Complex pattern matching

Search and Replace Methods

Literal Text Search

Searches for exact text matches without special interpretation.

Example: Find "hello" and replace with "hi"
Input: "Hello world, hello there!"
Output: "Hello world, hi there!" (case-sensitive)

Case-Insensitive Search

Matches text regardless of capitalization.

Example: Find "HELLO" (case-insensitive) and replace with "hi"
Input: "Hello world, HELLO there!"
Output: "hi world, hi there!"

Whole Word Matching

Matches complete words only, not partial matches within other words.

Example: Find whole word "cat" and replace with "dog"
Input: "The cat and catastrophe"
Output: "The dog and catastrophe"

Regular Expression (Regex) Search

Uses pattern matching for complex search and replace operations.

Example: Find email pattern and anonymize
Pattern: \b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b
Replace: [EMAIL]
Input: "Contact john@example.com or support@test.org"
Output: "Contact [EMAIL] or [EMAIL]"

Regex Replace Patterns

Capture Groups and Backreferences

Basic Capture Groups

Find: (\w+)\s+(\w+)
Replace: $2, $1
Swaps first and last names

Date Format Conversion

Find: (\d{2})/(\d{2})/(\d{4})
Replace: $3-$1-$2
MM/DD/YYYY to YYYY-MM-DD

URL Transformation

Find: https?://([^/]+)(/.*)?
Replace: [$1]$2
Extract domain and path separately

Advanced Replacement Techniques

Conditional Replacement

Use lookahead/lookbehind assertions
Match based on context
Replace only in specific conditions

Case Conversion

Transform to uppercase/lowercase
Title case conversion
Preserve original case patterns

Common Find & Replace Examples

Data Cleaning

Remove Extra Whitespace

Find: \s+
Replace:

Remove Line Breaks

Find: \r?\n
Replace:

Extract Numbers

Find: [^\d\s]
Replace:

Format Phone Numbers

Find: (\d{3})(\d{3})(\d{4})
Replace: ($1) $2-$3

Code Refactoring

Update Function Calls

Find: oldFunction\((.*?)\)
Replace: newFunction($1)

Convert Comments

Find: //\s*(.*)
Replace: /* $1 */

Add Semicolons

Find: (\w+)$
Replace: $1;

Update Import Paths

Find: from ['"]\.\./(.*?)['"]
Replace: from '@/$1'

Content Processing

Convert Links to Markdown

Find: <a href="(.*?)">(.*?)</a>
Replace: [$2]($1)

Extract Email Domains

Find: \b\w+@(\w+\.\w+)\b
Replace: $1

Title Case Conversion

Find: \b(\w)(\w*)\b
Replace: Use with case conversion

CSV Column Extraction

Find: ^[^,]*,([^,]*),.*$
Replace: $1

Professional Applications

📝

Content Management

Blog migration, CMS updates, bulk content editing, and template modifications

💻

Software Development

Code refactoring, variable renaming, API updates, and configuration changes

📊

Data Processing

CSV cleaning, format conversion, data normalization, and validation

🌐

Web Development

URL updates, HTML/CSS modifications, JavaScript refactoring, and SEO optimization

📋

Documentation

Technical writing, format standardization, link updates, and style consistency

🔧

System Administration

Log processing, configuration management, script updates, and automation

Best Practices and Tips

✅ Effective Find & Replace

  • Always backup your data before bulk operations
  • Test patterns on a small sample first
  • Use preview mode to verify changes
  • Be specific with your search patterns
  • Consider case sensitivity requirements
  • Use word boundaries for exact matches
  • Escape special characters in literal searches
  • Document complex regex patterns for future use

❌ Common Mistakes

  • Not testing regex patterns thoroughly
  • Forgetting to escape special characters
  • Using overly broad search patterns
  • Not considering edge cases and exceptions
  • Replacing without understanding context
  • Ignoring case sensitivity implications
  • Not using capture groups effectively
  • Making irreversible changes without backups