Regex Tester and generator
Regex Tester and generator helps you to test your Regular Expression and generate regex code for JavaScript PHP Go JAVA Ruby and Python.
Common Regular Expressions
Check digit expressions
- Digit:
^[0-9]*$
- N digits:
^\d{n}$ - At least N digits:
^\d{n,}$ - m-n digits:
^\d{m,n}$ - Zero and non-zero start digits:
^(0|[1-9][0-9]*)$
- Nonzero number with up to two decimal places:
^([1-9][0-9]*)+(.[0-9]{1,2})?$ - A positive or negative number with one or two decimal places:
^(\-)?\d+(\.\d{1,2})?$ - Positive, negative, and decimals:
^(\-|\+)?\d+(\.\d+)?$
- A positive real number with two decimal places:
^[0-9]+(.[0-9]{2})?$ - A positive real number with 1 to 3 decimal places:
^[0-9]+(.[0-9]{1,3})?$ - A non-zero positive integer:
^[1-9]\d*$ or ^([1-9][0-9]*){1,3}$ or ^\+?[1-9][0-9]*$ - A non-zero negative integer:
^\-[1-9][]0-9"*$ or ^-[1-9]\d*$
- Non-negative integers:
^\d+$ or ^[1-9]\d*|0$
- Non-positive integer:
^-[1-9]\d*|0$ or ^((-\d+)|(0+))$
- Non-negative floating-point numbers:
^\d+(\.\d+)?$ or ^[1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0$
- Non-positive floating-point number:
^((-\d+(\.\d+)?)|(0+(\.0+)?))$ or ^(-([1-9]\d*\.\d*|0\.\d*[1-9]\d*))|0?\.0+|0$
- Floating point number:
^[1-9]\d*\.\d*|0\.\d*[1-9]\d*$ or ^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$
- Negative Float:
^-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)$ or ^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$
- Floating point number:
^(-?\d+)(\.\d+)?$ or ^-?([1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0)$
Check character expressions
- Alpha-Numeric Characters:
^[A-Za-z0-9]+$ or ^[A-Za-z0-9]{4,40}$ - All characters with a length of 3-20:
^.{3,20}$ - A string of 26 letters:
^[A-Za-z]+$
- A string of 26 uppercase English letters:
^[A-Z]+$
- A string of 26 lowercase alphabetic characters:
^[a-z]+$
- A string of numbers and 26 letters:
^[A-Za-z0-9]+$
- A string of numbers, 26 letters, or an underscore:
^\w+$ or ^\w{3,20}$ - input with ^%&',;=?$\":
[^%&',;=?$\x22]+
- It is forbidden to input characters with ~:
[^~\x22]+
Special Needs Expressions
- Email:
^[a-zA-Z0-9_.+-][email protected][a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$
- URL or Domain name:
^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?
- Date (MM/DD/YYYY)/(MM-DD-YYYY)/(MM.DD.YYYY)/(MM DD YYYY):
^(0?[1-9]|1[012])[- /.](0?[1-9]|[12][0-9]|3[01])[- /.](19|20)?[0-9]{2}$ - 12 months of the year(01~09和1~12):
^(0?[1-9]|1[0-2])$
- 31 days a month(01~09和1~31):
^(0[1-9]|[12][0-9]|3[01])$
- Password:
^.*(?=.{6,})(?=.*d)(?=.*[A-Z])(?=.*[a-z])(?=.*[[email protected]#$%^&*? ]).*$ - US Phone Numbers
\b\d{3}[-.]?\d{3}[-.]?\d{4}\b - US Zip code
^[0-9]{5}(?:-[0-9]{4})?$ - Slug
^[a-z0-9-]+$
- All the special characters need to be escaped
/[\-\[\]\/\\\{\}\(\)\*\+\?\.\^\$\|]/ - xml file:
^([a-zA-Z]+-?)+[a-zA-Z0-9]+\\.[x|X][m|M][l|L]$
- Regular expressions for Chinese characters:
[\u4e00-\u9fa5]
- Double-byte characters:
[^\x00-\xff]
- Blank line:
\n\s*\r (be used to delete blank lines)
- HTML tags:
<(\S*?)[^>]*>.*?|<.*? />
- The leading and trailing whitespace character:
^\s*|\s*$ or (^\s*)|(\s*$)
- IP address:
((?:(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d)))\.){3}(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d))))
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Unit Converters
- Weight Converter
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- Density & Mass Capacity Converter
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Utilities
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- Base64 To Image Converter
- Image To Base64 Converter
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- Character info generator
- Text to HTML Entities Converter
- URL Parser
- Auto refresh page
Escape Unescape
- JSON Escape Unescape
- C# Escape Unescape
- Javascript Escape Unescape
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- CSV Escape Unescape
- SQL Escape Unescape
- HTML Escape Unescape
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Cryptography
String Utilities
- Base Number converter
- Base64 Encoder / Decoder
- Difference viewer
- Url Encoder
- Url Decoder
- Html Encoder
- Html Decoder
- Add slashes
- Strip slashes
- Number To Word Converter
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- Text Transformer
- Case Converter
- Date Calculator
- Date/Time To Unix TimeStamp
- Unix TimeStamp To Date/Time
- Seconds to Human Time Converter
- Seconds to Hours:Minutes:Seconds Converter
Image Converters
IP Domain tools
Code Editor Tools
Color Converters