Regex Tester, Online Regular Expression Testing, Regex Validator - 1024Tools

Regex Tester, Online Regular Expression Testing, Regex Validator

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Please enter regular expression

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Click /g button to select flags

Test string Matches will be highlighted directly in the editor

Match details 0

#	Match	Index	Capture groups

Validation Patterns

Email Address

^[\w.-]+@[\w.-]+\.[A-Za-z]{2,}$

Chinese Mobile Number

^1[3-9]\d{9}$

Chinese ID Card

^\d{17}[\dXx]$

IPv4 Address

^(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)$

Hexadecimal Color

^#?([a-fA-F0-9]{6}|[a-fA-F0-9]{3})$

Extraction Patterns

URL

https?:\/\/[^\s]+

Chinese Characters

[\u4e00-\u9fa5]+

Date (YYYY-MM-DD)

\d{4}-\d{2}-\d{2}

Time (HH:MM:SS)

\d{2}:\d{2}:\d{2}

HTML img src attribute

src=[\"']([^\"']+)[\"']

Basic Quantifiers

Pattern	Description
`*`	0 or more times
`+`	1 or more times
`?`	0 or 1 time
`{n}`	Exactly n times
`{n,}`	n or more times
`{n,m}`	Between n and m times

Greedy vs Lazy

Pattern	Description
`*?`	0 or more (lazy)
`+?`	1 or more (lazy)
`??`	0 or 1 (lazy)
`{n,}?`	n or more (lazy)
`{n,m}?`	Between n and m (lazy)

Character Classes

Pattern	Description
`.`	Any character except newline
`\d`	Digit [0-9]
`\D`	Not a digit [^0-9]
`\w`	Word character [A-Za-z0-9_]
`\W`	Not a word character [^A-Za-z0-9_]
`\s`	Whitespace (space, tab, newline, etc.)
`\S`	Not whitespace
`[abc]`	Match any character in set
`[^abc]`	Match any character not in set
`[a-z]`	Match any character in range

Anchors

Pattern	Description
`^`	Start of string or line
`$`	End of string or line
`\b`	Word boundary
`\B`	Not word boundary

Escape Sequences

Pattern	Description
`\n`	Newline
`\r`	Carriage return
`\t`	Tab
`\\`	Backslash
`\.`	Escape special characters (. * + ? ^ $ [ ] { } ( ) \| \)

Groups & Capturing

Pattern	Description
`(abc)`	Capturing group, can reference with $1, $2, etc.
`(?:abc)`	Non-capturing group, groups but doesn't capture
`(?<name>abc)`	Named capturing group
`\1, \2`	Backreference to captured group
`$1, $2`	Reference captured groups in replacement

Lookaround Assertions

Pattern	Description
`(?=abc)`	Positive lookahead
`(?!abc)`	Negative lookahead
`(?<=abc)`	Positive lookbehind
`(?<!abc)`	Negative lookbehind
`(a\|b)`	Alternation, match a or b