🔍 Regex Tool

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✨ Pattern Generator
1
Select Context Block
Select the entire block of text that contains both changing and unchanging parts
2
Select Changing Bit
Within the context, select the part that changes (e.g., numbers, dates, specific words)
Generated Pattern:
How to use Dual Selection Mode:
  1. Paste sample text with repeating patterns (like log entries, structured data, etc.)
  2. Click "Select Context" and highlight the entire block containing both changing and fixed parts
  3. Click "Select Changing Bit" and highlight just the part that varies (numbers, dates, etc.)
  4. Click "Generate Pattern" to create a regex that captures the changing bit with context
  5. The pattern will include surrounding text for context and capture only the variable part
Example: If you select "Order ID: 12345 Date: 2023-10-01" as context and "12345" as the changing bit, it will generate a pattern like Order ID: (\d+)
Regular Expression Pattern
/ /
Test String
Match Results
Highlighted Matches
Common Patterns
Email Address
(\w+)@(\w+\.\w+)
Matches basic email addresses
Phone Number
\(?(\d{3})\)?[-.\s]?(\d{3})[-.\s]?(\d{4})
Matches US phone numbers
URL
https?://[\w\-.]+(:\d+)?(/[\w\-./]*)?
Matches HTTP/HTTPS URLs
Date (MM/DD/YYYY)
(\d{1,2})/(\d{1,2})/(\d{4})
Matches dates in MM/DD/YYYY format
Hex Color
#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})
Matches hex color codes
IP Address
\b(\d{1,3}\.){3}\d{1,3}\b
Matches IPv4 addresses
Quick Reference
Character Classes
\d Any digit (0-9)
\w Word character (a-z, A-Z, 0-9, _)
\s Whitespace
. Any character
Quantifiers
* 0 or more
+ 1 or more
? 0 or 1
{n} Exactly n times
{n,m} Between n and m times
Anchors
^ Start of line
$ End of line
\b Word boundary
Groups
(...) Capture group
(?:...) Non-capturing group
| OR operator