Regex Tester

const response = await fetch('https://api.apiverve.com/v1/regextester', {
  method: 'POST',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    "pattern": "\\d{3}-\\d{2}-\\d{4}",
    "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
    "flags": "g"
})
});

const data = await response.json();
console.log(data);

import requests

headers = {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
}

payload = {
    "pattern": "\\d{3}-\\d{2}-\\d{4}",
    "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
    "flags": "g"
}

response = requests.post('https://api.apiverve.com/v1/regextester', headers=headers, json=payload)

data = response.json()
print(data)

const https = require('https');
const url = require('url');

const options = {
  method: 'POST',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
};

const postData = JSON.stringify({
  "pattern": "\\d{3}-\\d{2}-\\d{4}",
  "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
  "flags": "g"
});

const req = https.request('https://api.apiverve.com/v1/regextester', options, (res) => {
  let data = '';
  res.on('data', (chunk) => data += chunk);
  res.on('end', () => console.log(JSON.parse(data)));
});

req.write(postData);
req.end();

<?php

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'https://api.apiverve.com/v1/regextester');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'X-API-Key: your_api_key_here',
    'Content-Type: application/json'
]);

curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode({
    'pattern': '\\d{3}-\\d{2}-\\d{4}',
    'text': 'My SSN is 123-45-6789 and my friend's is 987-65-4321',
    'flags': 'g'
}));

$response = curl_exec($ch);
curl_close($ch);

$data = json_decode($response, true);
print_r($data);

?>

package main

import (
    "fmt"
    "io"
    "net/http"
    "bytes"
    "encoding/json"
)

func main() {
    payload := map[string]interface{}{
        "pattern": "\d{3}-\d{2}-\d{4}",
        "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
        "flags": "g"
    }

    jsonPayload, _ := json.Marshal(payload)
    req, _ := http.NewRequest("POST", "https://api.apiverve.com/v1/regextester", bytes.NewBuffer(jsonPayload))

    req.Header.Set("X-API-Key", "your_api_key_here")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}

require 'net/http'
require 'json'

uri = URI('https://api.apiverve.com/v1/regextester')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

payload = {
  "pattern": "\\d{3}-\\d{2}-\\d{4}",
  "text": "My SSN is 123-45-6789 and my friend's is 987-65-4321",
  "flags": "g"
}

request = Net::HTTP::Post.new(uri)
request['X-API-Key'] = 'your_api_key_here'
request['Content-Type'] = 'application/json'

request.body = payload.to_json

response = http.request(request)
puts JSON.pretty_generate(JSON.parse(response.body))

using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        using var client = new HttpClient();
        client.DefaultRequestHeaders.Add("X-API-Key", "your_api_key_here");

        var jsonContent = @"{
        ""pattern"": ""\\d{3}-\\d{2}-\\d{4}"",
        ""text"": ""My SSN is 123-45-6789 and my friend's is 987-65-4321"",
        ""flags"": ""g""
}";
        var content = new StringContent(jsonContent, Encoding.UTF8, "application/json");

        var response = await client.PostAsync("https://api.apiverve.com/v1/regextester", content);
        response.EnsureSuccessStatusCode();

        var responseBody = await response.Content.ReadAsStringAsync();
        Console.WriteLine(responseBody);
    }
}

<Root>
  <status>ok</status>
  <error />
  <data>
    <pattern>\d{3}-\d{2}-\d{4}</pattern>
    <text>My SSN is 123-45-6789 and my friend's is 987-65-4321</text>
    <flags>g</flags>
    <test_type>test</test_type>
    <replacement />
    <is_valid_regex>true</is_valid_regex>
    <regex_info>
      <pattern>\d{3}-\d{2}-\d{4}</pattern>
      <flags>
        <global>true</global>
        <ignore_case>false</ignore_case>
        <multiline>false</multiline>
        <sticky>false</sticky>
        <unicode>false</unicode>
        <dot_all>false</dot_all>
      </flags>
      <source>\d{3}-\d{2}-\d{4}</source>
      <last_index>21</last_index>
      <pattern_length>17</pattern_length>
      <complexity>Medium</complexity>
    </regex_info>
    <test_results>
      <operation>test</operation>
      <result>true</result>
      <execution_time_ms>0</execution_time_ms>
      <description>Returns true if pattern matches anywhere in text, false otherwise</description>
    </test_results>
    <performance>
      <iterations>192</iterations>
      <total_time_ms>0</total_time_ms>
      <average_time_ms>0</average_time_ms>
      <performance_rating>Excellent</performance_rating>
    </performance>
    <pattern_analysis>
      <contains_anchors>
        <start_anchor>false</start_anchor>
        <end_anchor>false</end_anchor>
        <word_boundary>false</word_boundary>
      </contains_anchors>
      <contains_quantifiers>
        <zero_or_more>false</zero_or_more>
        <one_or_more>false</one_or_more>
        <zero_or_one>false</zero_or_one>
        <specific_count>true</specific_count>
        <range_count>false</range_count>
      </contains_quantifiers>
      <contains_groups>
        <capturing_groups>0</capturing_groups>
        <non_capturing_groups>0</non_capturing_groups>
        <named_groups>0</named_groups>
      </contains_groups>
      <contains_character_classes>
        <predefined_classes>true</predefined_classes>
        <custom_classes>false</custom_classes>
        <negated_classes>false</negated_classes>
      </contains_character_classes>
      <contains_special_chars>
        <wildcard>false</wildcard>
        <pipe>false</pipe>
        <escape_sequences>3</escape_sequences>
      </contains_special_chars>
    </pattern_analysis>
    <suggestions>Consider anchoring with ^ or $ if you need exact matches</suggestions>
    <common_patterns>
      <name>Email Address</name>
      <pattern>^[\w\.-]+@[\w\.-]+\.[a-zA-Z]{2,}$</pattern>
      <description>Matches valid email addresses</description>
      <example>[email protected]</example>
    </common_patterns>
    <common_patterns>
      <name>Phone Number (US)</name>
      <pattern>^\(?(\d{3})\)?[-.\s]?(\d{3})[-.\s]?(\d{4})$</pattern>
      <description>Matches US phone numbers in various formats</description>
      <example>(123) 456-7890</example>
    </common_patterns>
    <common_patterns>
      <name>URL</name>
      <pattern>^https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&amp;//=]*)$</pattern>
      <description>Matches HTTP and HTTPS URLs</description>
      <example>https://www.example.com</example>
    </common_patterns>
    <common_patterns>
      <name>IP Address (IPv4)</name>
      <pattern>^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$</pattern>
      <description>Matches valid IPv4 addresses</description>
      <example>192.168.1.1</example>
    </common_patterns>
    <common_patterns>
      <name>Credit Card Number</name>
      <pattern>^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|3[0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$</pattern>
      <description>Matches major credit card formats</description>
      <example>4532123456789012</example>
    </common_patterns>
    <common_patterns>
      <name>Social Security Number</name>
      <pattern>^\d{3}-?\d{2}-?\d{4}$</pattern>
      <description>Matches SSN with or without dashes</description>
      <example>123-45-6789</example>
    </common_patterns>
    <common_patterns>
      <name>Date (MM/DD/YYYY)</name>
      <pattern>^(0[1-9]|1[0-2])\/(0[1-9]|[12][0-9]|3[01])\/(19|20)\d{2}$</pattern>
      <description>Matches MM/DD/YYYY date format</description>
      <example>12/31/2023</example>
    </common_patterns>
    <common_patterns>
      <name>Time (24-hour)</name>
      <pattern>^([01]?[0-9]|2[0-3]):[0-5][0-9]$</pattern>
      <description>Matches 24-hour time format</description>
      <example>14:30</example>
    </common_patterns>
    <common_patterns>
      <name>Hexadecimal Color</name>
      <pattern>^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$</pattern>
      <description>Matches hex color codes</description>
      <example>#FF5733</example>
    </common_patterns>
    <common_patterns>
      <name>Strong Password</name>
      <pattern>^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&amp;])[A-Za-z\d@$!%*?&amp;]{8,}$</pattern>
      <description>At least 8 chars with uppercase, lowercase, digit, and special char</description>
      <example>MyP@ssw0rd</example>
    </common_patterns>
    <regex_guide>
      <basic_syntax>
        <symbol>.</symbol>
        <description>Matches any single character except newline</description>
      </basic_syntax>
      <basic_syntax>
        <symbol>*</symbol>
        <description>Matches 0 or more of the preceding character</description>
      </basic_syntax>
      <basic_syntax>
        <symbol>+</symbol>
        <description>Matches 1 or more of the preceding character</description>
      </basic_syntax>
      <basic_syntax>
        <symbol>?</symbol>
        <description>Matches 0 or 1 of the preceding character</description>
      </basic_syntax>
      <basic_syntax>
        <symbol>^</symbol>
        <description>Matches start of string</description>
      </basic_syntax>
      <basic_syntax>
        <symbol>$</symbol>
        <description>Matches end of string</description>
      </basic_syntax>
      <basic_syntax>
        <symbol>|</symbol>
        <description>OR operator</description>
      </basic_syntax>
      <basic_syntax>
        <symbol>\</symbol>
        <description>Escape character</description>
      </basic_syntax>
      <character_classes>
        <symbol>[abc]</symbol>
        <description>Matches any character in the set</description>
      </character_classes>
      <character_classes>
        <symbol>[^abc]</symbol>
        <description>Matches any character NOT in the set</description>
      </character_classes>
      <character_classes>
        <symbol>[a-z]</symbol>
        <description>Matches any lowercase letter</description>
      </character_classes>
      <character_classes>
        <symbol>[A-Z]</symbol>
        <description>Matches any uppercase letter</description>
      </character_classes>
      <character_classes>
        <symbol>[0-9]</symbol>
        <description>Matches any digit</description>
      </character_classes>
      <character_classes>
        <symbol>\d</symbol>
        <description>Matches any digit (equivalent to [0-9])</description>
      </character_classes>
      <character_classes>
        <symbol>\w</symbol>
        <description>Matches any word character [a-zA-Z0-9_]</description>
      </character_classes>
      <character_classes>
        <symbol>\s</symbol>
        <description>Matches any whitespace character</description>
      </character_classes>
      <quantifiers>
        <symbol>{n}</symbol>
        <description>Matches exactly n times</description>
      </quantifiers>
      <quantifiers>
        <symbol>{n,}</symbol>
        <description>Matches n or more times</description>
      </quantifiers>
      <quantifiers>
        <symbol>{n,m}</symbol>
        <description>Matches between n and m times</description>
      </quantifiers>
      <quantifiers>
        <symbol>*?</symbol>
        <description>Non-greedy: matches 0 or more (lazy)</description>
      </quantifiers>
      <quantifiers>
        <symbol>+?</symbol>
        <description>Non-greedy: matches 1 or more (lazy)</description>
      </quantifiers>
      <quantifiers>
        <symbol>??</symbol>
        <description>Non-greedy: matches 0 or 1 (lazy)</description>
      </quantifiers>
      <groups>
        <symbol>(abc)</symbol>
        <description>Capturing group</description>
      </groups>
      <groups>
        <symbol>(?:abc)</symbol>
        <description>Non-capturing group</description>
      </groups>
      <groups>
        <symbol>(?&lt;name&gt;abc)</symbol>
        <description>Named capturing group</description>
      </groups>
      <groups>
        <symbol>(?=abc)</symbol>
        <description>Positive lookahead</description>
      </groups>
      <groups>
        <symbol>(?!abc)</symbol>
        <description>Negative lookahead</description>
      </groups>
      <groups>
        <symbol>(?&lt;=abc)</symbol>
        <description>Positive lookbehind</description>
      </groups>
      <groups>
        <symbol>(?&lt;!abc)</symbol>
        <description>Negative lookbehind</description>
      </groups>
      <flags>
        <flag>g</flag>
        <description>Global - find all matches</description>
      </flags>
      <flags>
        <flag>i</flag>
        <description>Case insensitive</description>
      </flags>
      <flags>
        <flag>m</flag>
        <description>Multiline - ^ and $ match line breaks</description>
      </flags>
      <flags>
        <flag>s</flag>
        <description>Dot matches newline characters</description>
      </flags>
      <flags>
        <flag>u</flag>
        <description>Unicode mode</description>
      </flags>
      <flags>
        <flag>y</flag>
        <description>Sticky - matches from lastIndex position</description>
      </flags>
    </regex_guide>
  </data>
</Root>

status: ok
error: 
data:
  pattern: \d{3}-\d{2}-\d{4}
  text: My SSN is 123-45-6789 and my friend's is 987-65-4321
  flags: g
  test_type: test
  replacement: 
  is_valid_regex: true
  regex_info:
    pattern: \d{3}-\d{2}-\d{4}
    flags:
      global: true
      ignore_case: false
      multiline: false
      sticky: false
      unicode: false
      dot_all: false
    source: \d{3}-\d{2}-\d{4}
    last_index: 21
    pattern_length: 17
    complexity: Medium
  test_results:
    operation: test
    result: true
    execution_time_ms: 0
    description: Returns true if pattern matches anywhere in text, false otherwise
  performance:
    iterations: 192
    total_time_ms: 0
    average_time_ms: 0
    performance_rating: Excellent
  pattern_analysis:
    contains_anchors:
      start_anchor: false
      end_anchor: false
      word_boundary: false
    contains_quantifiers:
      zero_or_more: false
      one_or_more: false
      zero_or_one: false
      specific_count: true
      range_count: false
    contains_groups:
      capturing_groups: 0
      non_capturing_groups: 0
      named_groups: 0
    contains_character_classes:
      predefined_classes: true
      custom_classes: false
      negated_classes: false
    contains_special_chars:
      wildcard: false
      pipe: false
      escape_sequences: 3
  suggestions:
  - Consider anchoring with ^ or $ if you need exact matches
  common_patterns:
  - name: Email Address
    pattern: ^[\w\.-]+@[\w\.-]+\.[a-zA-Z]{2,}$
    description: Matches valid email addresses
    example: [email protected]
  - name: Phone Number (US)
    pattern: ^\(?(\d{3})\)?[-.\s]?(\d{3})[-.\s]?(\d{4})$
    description: Matches US phone numbers in various formats
    example: (123) 456-7890
  - name: URL
    pattern: ^https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)$
    description: Matches HTTP and HTTPS URLs
    example: https://www.example.com
  - name: IP Address (IPv4)
    pattern: ^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$
    description: Matches valid IPv4 addresses
    example: 192.168.1.1
  - name: Credit Card Number
    pattern: ^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|3[0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$
    description: Matches major credit card formats
    example: 4532123456789012
  - name: Social Security Number
    pattern: ^\d{3}-?\d{2}-?\d{4}$
    description: Matches SSN with or without dashes
    example: 123-45-6789
  - name: Date (MM/DD/YYYY)
    pattern: ^(0[1-9]|1[0-2])\/(0[1-9]|[12][0-9]|3[01])\/(19|20)\d{2}$
    description: Matches MM/DD/YYYY date format
    example: 12/31/2023
  - name: Time (24-hour)
    pattern: ^([01]?[0-9]|2[0-3]):[0-5][0-9]$
    description: Matches 24-hour time format
    example: 14:30
  - name: Hexadecimal Color
    pattern: ^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$
    description: Matches hex color codes
    example: '#FF5733'
  - name: Strong Password
    pattern: ^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$
    description: At least 8 chars with uppercase, lowercase, digit, and special char
    example: MyP@ssw0rd
  regex_guide:
    basic_syntax:
    - symbol: .
      description: Matches any single character except newline
    - symbol: '*'
      description: Matches 0 or more of the preceding character
    - symbol: +
      description: Matches 1 or more of the preceding character
    - symbol: '?'
      description: Matches 0 or 1 of the preceding character
    - symbol: ^
      description: Matches start of string
    - symbol: $
      description: Matches end of string
    - symbol: '|'
      description: OR operator
    - symbol: \
      description: Escape character
    character_classes:
    - symbol: '[abc]'
      description: Matches any character in the set
    - symbol: '[^abc]'
      description: Matches any character NOT in the set
    - symbol: '[a-z]'
      description: Matches any lowercase letter
    - symbol: '[A-Z]'
      description: Matches any uppercase letter
    - symbol: '[0-9]'
      description: Matches any digit
    - symbol: \d
      description: Matches any digit (equivalent to [0-9])
    - symbol: \w
      description: Matches any word character [a-zA-Z0-9_]
    - symbol: \s
      description: Matches any whitespace character
    quantifiers:
    - symbol: '{n}'
      description: Matches exactly n times
    - symbol: '{n,}'
      description: Matches n or more times
    - symbol: '{n,m}'
      description: Matches between n and m times
    - symbol: '*?'
      description: 'Non-greedy: matches 0 or more (lazy)'
    - symbol: +?
      description: 'Non-greedy: matches 1 or more (lazy)'
    - symbol: ??
      description: 'Non-greedy: matches 0 or 1 (lazy)'
    groups:
    - symbol: (abc)
      description: Capturing group
    - symbol: (?:abc)
      description: Non-capturing group
    - symbol: (?<name>abc)
      description: Named capturing group
    - symbol: (?=abc)
      description: Positive lookahead
    - symbol: (?!abc)
      description: Negative lookahead
    - symbol: (?<=abc)
      description: Positive lookbehind
    - symbol: (?<!abc)
      description: Negative lookbehind
    flags:
    - flag: g
      description: Global - find all matches
    - flag: i
      description: Case insensitive
    - flag: m
      description: Multiline - ^ and $ match line breaks
    - flag: s
      description: Dot matches newline characters
    - flag: u
      description: Unicode mode
    - flag: y
      description: Sticky - matches from lastIndex position

| Field | Value |
| --- | --- |
| status | ok |
| error |  |
| pattern | \d{3}-\d{2}-\d{4} |
| text | My SSN is 123-45-6789 and my friend's is 987-65-4321 |
| flags | g |
| test_type | test |
| replacement |  |
| is_valid_regex | True |
| regex_info.pattern | \d{3}-\d{2}-\d{4} |
| regex_info.flags.global | True |
| regex_info.flags.ignore_case | False |
| regex_info.flags.multiline | False |
| regex_info.flags.sticky | False |
| regex_info.flags.unicode | False |
| regex_info.flags.dot_all | False |
| regex_info.source | \d{3}-\d{2}-\d{4} |
| regex_info.last_index | 21 |
| regex_info.pattern_length | 17 |
| regex_info.complexity | Medium |
| test_results.operation | test |
| test_results.result | True |
| test_results.execution_time_ms | 0 |
| test_results.description | Returns true if pattern matches anywhere in text, false otherwise |
| performance.iterations | 192 |
| performance.total_time_ms | 0 |
| performance.average_time_ms | 0 |
| performance.performance_rating | Excellent |
| pattern_analysis.contains_anchors.start_anchor | False |
| pattern_analysis.contains_anchors.end_anchor | False |
| pattern_analysis.contains_anchors.word_boundary | False |
| pattern_analysis.contains_quantifiers.zero_or_more | False |
| pattern_analysis.contains_quantifiers.one_or_more | False |
| pattern_analysis.contains_quantifiers.zero_or_one | False |
| pattern_analysis.contains_quantifiers.specific_count | True |
| pattern_analysis.contains_quantifiers.range_count | False |
| pattern_analysis.contains_groups.capturing_groups | 0 |
| pattern_analysis.contains_groups.non_capturing_groups | 0 |
| pattern_analysis.contains_groups.named_groups | 0 |
| pattern_analysis.contains_character_classes.predefined_classes | True |
| pattern_analysis.contains_character_classes.custom_classes | False |
| pattern_analysis.contains_character_classes.negated_classes | False |
| pattern_analysis.contains_special_chars.wildcard | False |
| pattern_analysis.contains_special_chars.pipe | False |
| pattern_analysis.contains_special_chars.escape_sequences | 3 |
| suggestions | Consider anchoring with ^ or $ if you need exact matches |
| common_patterns | {"name":"Email Address","pattern":"^[\\w\\.-]+@[\\w\\.-]+\\.[a-zA-Z]{2,}$","description":"Matches valid email addresses","example":"[email protected]"}; {"name":"Phone Number (US)","pattern":"^\\(?(\\d{3})\\)?[-.\\s]?(\\d{3})[-.\\s]?(\\d{4})$","description":"Matches US phone numbers in various formats","example":"(123) 456-7890"}; {"name":"URL","pattern":"^https?:\\/\\/(www\\.)?[-a-zA-Z0-9@:%._\\+~#=]{1,256}\\.[a-zA-Z0-9()]{1,6}\\b([-a-zA-Z0-9()@:%_\\+.~#?&//=]*)$","description":"Matches HTTP and HTTPS URLs","example":"https://www.example.com"}; {"name":"IP Address (IPv4)","pattern":"^(?:(?:25[0-5]\|2[0-4][0-9]\|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]\|2[0-4][0-9]\|[01]?[0-9][0-9]?)$","description":"Matches valid IPv4 addresses","example":"192.168.1.1"}; {"name":"Credit Card Number","pattern":"^(?:4[0-9]{12}(?:[0-9]{3})?\|5[1-5][0-9]{14}\|3[47][0-9]{13}\|3[0-9]{13}\|6(?:011\|5[0-9]{2})[0-9]{12})$","description":"Matches major credit card formats","example":"4532123456789012"}; {"name":"Social Security Number","pattern":"^\\d{3}-?\\d{2}-?\\d{4}$","description":"Matches SSN with or without dashes","example":"123-45-6789"}; {"name":"Date (MM/DD/YYYY)","pattern":"^(0[1-9]\|1[0-2])\\/(0[1-9]\|[12][0-9]\|3[01])\\/(19\|20)\\d{2}$","description":"Matches MM/DD/YYYY date format","example":"12/31/2023"}; {"name":"Time (24-hour)","pattern":"^([01]?[0-9]\|2[0-3]):[0-5][0-9]$","description":"Matches 24-hour time format","example":"14:30"}; {"name":"Hexadecimal Color","pattern":"^#([A-Fa-f0-9]{6}\|[A-Fa-f0-9]{3})$","description":"Matches hex color codes","example":"#FF5733"}; {"name":"Strong Password","pattern":"^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)(?=.*[@$!%*?&])[A-Za-z\\d@$!%*?&]{8,}$","description":"At least 8 chars with uppercase, lowercase, digit, and special char","example":"MyP@ssw0rd"} |
| regex_guide.basic_syntax | {"symbol":".","description":"Matches any single character except newline"}; {"symbol":"*","description":"Matches 0 or more of the preceding character"}; {"symbol":"+","description":"Matches 1 or more of the preceding character"}; {"symbol":"?","description":"Matches 0 or 1 of the preceding character"}; {"symbol":"^","description":"Matches start of string"}; {"symbol":"$","description":"Matches end of string"}; {"symbol":"\|","description":"OR operator"}; {"symbol":"\\","description":"Escape character"} |
| regex_guide.character_classes | {"symbol":"[abc]","description":"Matches any character in the set"}; {"symbol":"[^abc]","description":"Matches any character NOT in the set"}; {"symbol":"[a-z]","description":"Matches any lowercase letter"}; {"symbol":"[A-Z]","description":"Matches any uppercase letter"}; {"symbol":"[0-9]","description":"Matches any digit"}; {"symbol":"\\d","description":"Matches any digit (equivalent to [0-9])"}; {"symbol":"\\w","description":"Matches any word character [a-zA-Z0-9_]"}; {"symbol":"\\s","description":"Matches any whitespace character"} |
| regex_guide.quantifiers | {"symbol":"{n}","description":"Matches exactly n times"}; {"symbol":"{n,}","description":"Matches n or more times"}; {"symbol":"{n,m}","description":"Matches between n and m times"}; {"symbol":"*?","description":"Non-greedy: matches 0 or more (lazy)"}; {"symbol":"+?","description":"Non-greedy: matches 1 or more (lazy)"}; {"symbol":"??","description":"Non-greedy: matches 0 or 1 (lazy)"} |
| regex_guide.groups | {"symbol":"(abc)","description":"Capturing group"}; {"symbol":"(?:abc)","description":"Non-capturing group"}; {"symbol":"(?<name>abc)","description":"Named capturing group"}; {"symbol":"(?=abc)","description":"Positive lookahead"}; {"symbol":"(?!abc)","description":"Negative lookahead"}; {"symbol":"(?<=abc)","description":"Positive lookbehind"}; {"symbol":"(?<!abc)","description":"Negative lookbehind"} |
| regex_guide.flags | {"flag":"g","description":"Global - find all matches"}; {"flag":"i","description":"Case insensitive"}; {"flag":"m","description":"Multiline - ^ and $ match line breaks"}; {"flag":"s","description":"Dot matches newline characters"}; {"flag":"u","description":"Unicode mode"}; {"flag":"y","description":"Sticky - matches from lastIndex position"} |