# Regex Replace Samples

Collection of common and useful regex replacement patterns for text transformation and data cleaning

> Canonical page: https://elysiatools.com/en/samples/regex-replace

- **Category:** Text Processing

- **Keywords:** regex, replace, transformation, text, pattern, substitution, formatting, cleaning

## Overview

Collection of common and useful regex replacement patterns for text transformation and data cleaning

## Examples

- **Date Format Conversion**: Convert dates between different formats (ISO to localized, US to European, etc.)
- **Phone Number Formatting**: Add or remove phone number formatting (dashes, parentheses, spaces)
- **Text Casing Transformations**: Change case of matched text using replacement patterns
- **URL Normalization**: Standardize URLs by adding protocol, removing www, normalizing paths
- **Email Obfuscation**: Hide or mask email addresses with asterisks or placeholders
- **HTML Tag Removal and Conversion**: Strip HTML tags or convert to markdown and other formats
- **Number Formatting**: Add thousand separators, decimal formatting, and number normalization
- **Credit Card Masking**: Hide sensitive credit card numbers, show only last 4 digits
- **Markdown Conversion**: Convert markdown to HTML or other formats
- **String Cleanup**: Remove extra spaces, line breaks, and special characters
- **Quote Normalization**: Convert between straight quotes, curly quotes, and other quote types
- **Path Conversion**: Convert between Windows and Unix file paths, normalize separators
- **Advanced Text Transformations**: Complex transformations including CSV parsing, log formatting, and data extraction

## When to use

- Use this sample set when you want reference inputs for Regex Replace Samples.
- Use it to preview output formats and compare related sample variants.

## How it works

- Open a sample entry to inspect the prepared example payload or asset.
- Compare it with related tools to understand how the workflow connects.

## Use cases

- Date Format Conversion
- Phone Number Formatting
- Text Casing Transformations
- URL Normalization
- Email Obfuscation
- HTML Tag Removal and Conversion

## Frequently asked questions

### What is included in Regex Replace Samples?

This page includes curated sample entries, related tools, and neighboring sample collections for Regex Replace Samples.

## Related tools

- [MOV to MP4 Converter](https://elysiatools.com/en/tools/mov-to-mp4): Convert MOV video files to MP4 format
- [MP4 to MOV Converter](https://elysiatools.com/en/tools/mp4-to-mov): Convert MP4 video files to MOV format
- [Batch Video Converter](https://elysiatools.com/en/tools/video-batch-converter): Convert multiple video files between different formats like MP4, WebM, MKV, AVI, MOV with quality settings and batch processing
- [Video to GIF Optimized](https://elysiatools.com/en/tools/video-to-gif-optimized): Convert videos to optimized GIF format with advanced compression settings
- [Stream Smart Remux](https://elysiatools.com/en/tools/stream-smart-remux): Rewrap media containers with stream copy.
- [Regex Replace Previewer](https://elysiatools.com/en/tools/regex-replace-previewer): Preview regex replacements in real-time with detailed diff highlights and statistics
- [Video Cutter](https://elysiatools.com/en/tools/video-cutter): Cut and trim video clips with precision, supporting multiple formats and quality settings
- [Video Horizontal Flip](https://elysiatools.com/en/tools/video-horizontal-flip): Flip video horizontally (mirror left-right) while keeping original container format and copying audio stream when possible

## Related content

- [Duplicate Line Samples](https://elysiatools.com/en/samples/text-duplicate-line-samples): Sample files with various types of duplicate lines for testing duplicate removal tools
- [Windows String Processing - C# Samples](https://elysiatools.com/en/samples/windows-string-processing-csharp): Comprehensive C# string processing examples for Windows platform including string manipulation, splitting, joining, regex operations, and text analysis
- [Text with Emoji Samples](https://elysiatools.com/en/samples/text-with-emoji-samples): Mixed language text containing various Unicode emojis for testing emoji extraction
- [Special Characters Samples](https://elysiatools.com/en/samples/text-special-characters-samples): Sample text files with various special characters, punctuation, and symbols for testing non-alphanumeric character removal
- [Code Comment Samples](https://elysiatools.com/en/samples/code-comment-samples): Sample code files with various comment styles for testing comment removal
- [Regex Named Capture Groups](https://elysiatools.com/en/samples/regex-named-groups): Collection of regex patterns using named capture groups for extracting structured data from text. Named groups make patterns more readable and maintainable by assigning meaningful names to captured portions.