Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
Processing...

Test String

Code Generator

Language

Generated Code

import re regex = re.compile(r".*((social|(simple|free|floating)\-share)\-buttons\.com|e\-buyeasy\.com|wp(securitycheck|themedetector)\.co\.uk|erot\.co|webmonetizer\.net|howtostopreferralspam\.eu|trafficmonetizer?\.org|непереводимая\.рф|websites\-reviews\.com|sanjosestartups\.com|4webmasters\.org|aliexpress\.com|event\-tracking\.com|webmaster\-traffic\.com|vitaly|torture\.ml|amanda\-porn\.ga|generalporn\.org|\-porn\.ga|\-forum\.ga|\-free\-traffic\.ga|buy\-cheap\-online\.info|get\-free\-traffic\-now|googlsucks\.com|o\-o\.|humanorightswatch\.org|bestwebsitesawards\.com|resellerclub|smailik\.org|darodar\.com|hulfingtonpost\.com|blackhatworth\.com|(buttons|videos|buttons)\-for(\-your)?\-(website|business)\.com|success\-seo\.com|semalt|best\-seo\-(solution|offer)|dailyrank\.net|sitevaluation\.org|100dollars\-seo\.com|forum69\.info|7makemoneyonline\.com|anticrawler\.org|baixar\-musicas\-gratis\.com|descargar\-musica\-gratis\.net).*", flags=re.IGNORECASE) test_str = ("site5.floating-share-buttons.com / referral\n" "e-buyeasy.com / referral\n" "wpsecuritycheck.co.uk / referral\n" "wpthemedetector.co.uk / referral\n" "erot.co / referral\n" "webmonetizer.net / referral\n" "howtostopreferralspam.eu / referral\n" "trafficmonetizer.org / referral\n" "wpsecuritycheck.co.uk / referral\n" "wpthemedetector.co.uk / referral\n" "trafficmonetize.org / referral\n" "непереводимая.рф / referral\n" "непереводимая.рф / organic\n" "websites-reviews.com / referral\n" "sanjosestartups.com / referral\n" "4webmasters.org / referral\n" "site1.floating-share-buttons.com\n" "site3.floating-share-buttons.com\n" "s.click.aliexpress.com/e/ay3rfmzfi /organic\n" "www.event-tracking.com / referral\n" "webmaster-traffic.com / referral\n" "vitaly rules google / organic\n" "torture.ml / referral\n" "amanda-porn.ga / referral\n" "generalporn.org / referral\n" "depositfiles-porn.ga / referral\n" "youporn-forum.ga / referral\n" "site2.floating-share-buttons.com\n" "rapidgator-porn.ga / referral\n" "meendo-free-traffic.ga / referral\n" "buy-cheap-online.info / referral\n" "www.Get-Free-Traffic-Now.com / referral\n" "addons.mozilla.org / referral\n" "googlsucks.com / referral\n" "simple-share-buttons.com / referral\n" "social-buttons.com / referral\n" "s.click.aliexpress.com / referral\n" "o-o-8-o-o.com / referral\n" "humanorightswatch.org / referral\n" "o-o-6-o-o.com / referral\n" "bestwebsitesawards.com / referral\n" "resellerclub scam / organic\n" "darodar.com / referral\n" "hulfingtonpost.com / referral\n" "ilovevitaly.com / referral\n" "blackhatworth.com / referral\n" "resellerclub scam / referral\n" "forum20.smailik.org / referral\n" "buttons-for-website.com\n" "buttons-for-your-website.com\n" "videos-for-your-business.com\n" "success-seo.com\n" "semaltmedia.com\n" "dailyrank.net\n" "sitevaluation.org\n" "100dollars-seo.com\n" "forum69.info\n" "best-seo-solution.com\n" "best-seo-offer.com\n" "semalt.semalt.com\n" "semalt.com\n" "7makemoneyonline.com\n" "anticrawler.org\n" "baixar-musicas-gratis.com\n" "descargar-musica-gratis.net") matches = regex.finditer(test_str) for match_num, match in enumerate(matches, start=1): print(f"Match {match_num} was found at {match.start()}-{match.end()}: {match.group()}") for group_num, group in enumerate(match.groups(), start=1): print(f"Group {group_num} found at {match.start(group_num)}-{match.end(group_num)}: {group}")

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html