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
No Match

/
/
mi

Test String

Code Generator

Language

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "href=\"(.*upn=.*)\" style.*?>\\s+Verify"; final String string = "<html xmlns=\"http://www.w3.org/1999/xhtml\" xmlns:v=\"urn:schemas-microsoft-com:vml\" xmlns:o=\"urn:schemas-microsoft-com:office:office\"><head>\n" + "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"><title></title>\n" + " <!--[if !mso]><!-- -->\n" + " <meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">\n" + " <!--<![endif]-->\n\n" + "<style type=\"text/css\">\n" + " #outlook a { padding: 0; }\n" + " .ReadMsgBody { width: 100%; }\n" + " .ExternalClass { width: 100%; }\n" + " .ExternalClass * { line-height:100%; }\n" + " body { margin: 0; padding: 0; -webkit-text-size-adjust: 100%; -ms-text-size-adjust: 100%; }\n" + " table, td { border-collapse:collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; }\n" + " img { border: 0; height: auto; line-height: 100%; outline: none; text-decoration: none; -ms-interpolation-mode: bicubic; }\n" + " p { display: block; margin: 13px 0; }\n" + "</style>\n" + "<!--[if !mso]><!-->\n" + "<style type=\"text/css\">\n" + " @media only screen and (max-width:480px) {\n" + " @-ms-viewport { width:320px; }\n" + " @viewport { width:320px; }\n" + " }\n" + "</style>\n" + "<!--<![endif]-->\n" + "<!--[if mso]>\n" + "<xml>\n" + " <o:OfficeDocumentSettings>\n" + " <o:AllowPNG/>\n" + " <o:PixelsPerInch>96</o:PixelsPerInch>\n" + " </o:OfficeDocumentSettings>\n" + "</xml>\n" + "<![endif]-->\n" + "<!--[if lte mso 11]>\n" + "<style type=\"text/css\">\n" + " .outlook-group-fix {\n" + " width:100% !important;\n" + " }\n" + "</style>\n" + "<![endif]-->\n\n" + "<!--[if !mso]><!-->\n" + " <link href=\"https://fonts.googleapis.com/css?family=Ubuntu:300,400,500,700\" rel=\"stylesheet\" type=\"text/css\">\n" + " <style type=\"text/css\">\n\n" + " @import url(https://fonts.googleapis.com/css?family=Ubuntu:300,400,500,700);\n\n" + " </style>\n" + " <!--<![endif]--><style type=\"text/css\">\n" + " @media only screen and (min-width:480px) {\n" + " .mj-column-per-100, * [aria-labelledby=\"mj-column-per-100\"] { width:100%!important; }\n" + " }\n" + "</style>\n" + "</head>\n" + "<body style=\"background: #F9F9F9;\">\n" + " <div style=\"background-color:#F9F9F9;\"><!--[if mso | IE]>\n" + " <table role=\"presentation\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\" width=\"640\" align=\"center\" style=\"width:640px;\">\n" + " <tr>\n" + " <td style=\"line-height:0px;font-size:0px;mso-line-height-rule:exactly;\">\n" + " <![endif]-->\n" + " <style type=\"text/css\">\n" + " html, body, * {\n" + " -webkit-text-size-adjust: none;\n" + " text-size-adjust: none;\n" + " }\n" + " a {\n" + " color:#1EB0F4;\n" + " text-decoration:none;\n" + " }\n" + " a:hover {\n" + " text-decoration:underline;\n" + " }\n" + " </style>\n" + "<div style=\"margin:0px auto;max-width:640px;background:transparent;\"><table role=\"presentation\" cellpadding=\"0\" cellspacing=\"0\" style=\"font-size:0px;width:100%;background:transparent;\" align=\"center\" border=\"0\"><tbody><tr><td style=\"text-align:center;vertical-align:top;direction:ltr;font-size:0px;padding:40px 0px;\"><!--[if mso | IE]>\n" + " <table role=\"presentation\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr><td style=\"vertical-align:top;width:640px;\">\n" + " <![endif]--><div aria-labelledby=\"mj-column-per-100\" class=\"mj-column-per-100 outlook-group-fix\" style=\"vertical-align:top;display:inline-block;direction:ltr;font-size:13px;text-align:left;width:100%;\"><table role=\"presentation\" cellpadding=\"0\" cellspacing=\"0\" width=\"100%\" border=\"0\"><tbody><tr><td style=\"word-break:break-word;font-size:0px;padding:0px;\" align=\"center\"><table role=\"presentation\" cellpadding=\"0\" cellspacing=\"0\" style=\"border-collapse:collapse;border-spacing:0px;\" align=\"center\" border=\"0\"><tbody><tr><td style=\"width:138px;\"><a href=\"https://click.discord.com/ls/click?upn=qDOo8cnwIoKzt0aLL1cBeARJoBrGSa2vu41A5vK-2B4ute1kWYI6zNuxQFCVciWW4K6TEd_qHrw4GmpuuXmFxW5rh3mZJII65iIReHI98SsrMc1mgu8ShbSoZ8MmrOuOGGsGiDHIxAufqB6YPIqUicSQdng-2FAkkdkJgcbJfSqW3G7PIwW0iDwBj6ngHMb3jpNUVVWN-2FoiD0N5rifXZR-2BuZ40dggmlyOiF01slKhKO45twRgh5yI-2B6RaM8bHbZ9G2qR9YaBAoAjs5won6SN5uA3pNhvrxK8VXeUVtOnahoRh0JoE1bxywCQ5yvaOCDMhZEA4yrSOdvd8YeVaoXfokZxRV5aw9Q-3D-3D\" target=\"_blank\"><img alt=\"\" title=\"\" height=\"38px\" src=\"https://cdn.discordapp.com/email_assets/592423b8aedd155170617c9ae736e6e7.png\" style=\"border:none;border-radius:;display:block;outline:none;text-decoration:none;width:100%;height:38px;\" width=\"138\"></a></td></tr></tbody></table></td></tr></tbody></table></div><!--[if mso | IE]>\n" + " </td></tr></table>\n" + " <![endif]--></td></tr></tbody></table></div><!--[if mso | IE]>\n" + " </td></tr></table>\n" + " <![endif]-->\n" + " <!--[if mso | IE]>\n" + " <table role=\"presentation\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\" width=\"640\" align=\"center\" style=\"width:640px;\">\n" + " <tr>\n" + " <td style=\"line-height:0px;font-size:0px;mso-line-height-rule:exactly;\">\n" + " <![endif]--><div style=\"max-width:640px;margin:0 auto;box-shadow:0px 1px 5px rgba(0,0,0,0.1);border-radius:4px;overflow:hidden\"><div style=\"margin:0px auto;max-width:640px;background:#ffffff;\"><table role=\"presentation\" cellpadding=\"0\" cellspacing=\"0\" style=\"font-size:0px;width:100%;background:#ffffff;\" align=\"center\" border=\"0\"><tbody><tr><td style=\"text-align:center;vertical-align:top;direction:ltr;font-size:0px;padding:40px 50px;\"><!--[if mso | IE]>\n" + " <table role=\"presentation\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr><td style=\"vertical-align:top;width:640px;\">\n" + " <![endif]--><div aria-labelledby=\"mj-column-per-100\" class=\"mj-column-per-100 outlook-group-fix\" style=\"vertical-align:top;display:inline-block;direction:ltr;font-size:13px;text-align:left;width:100%;\"><table role=\"presentation\" cellpadding=\"0\" cellspacing=\"0\" width=\"100%\" border=\"0\"><tbody><tr><td style=\"word-break:break-word;font-size:0px;padding:0px;\" align=\"left\"><div style=\"cursor:auto;color:#737F8D;font-family:Whitney, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;line-height:24px;text-align:left;\">\n" + " \n" + " <h2 style=\"font-family: Whitney, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-weight: 500;font-size: 20px;color: #4F545C;letter-spacing: 0.27px;\">Hey AnthraX,</h2>\n" + "<p>Thanks for registering for an account on Discord! Before we get started, we just need to confirm that this is you. Click below to verify your email address:</p>\n\n" + " </div></td></tr><tr><td style=\"word-break:break-word;font-size:0px;padding:10px 25px;padding-top:20px;\" align=\"center\"><table role=\"presentation\" cellpadding=\"0\" cellspacing=\"0\" style=\"border-collapse:separate;\" align=\"center\" border=\"0\"><tbody><tr><td style=\"border:none;border-radius:3px;color:white;cursor:auto;padding:15px 19px;\" align=\"center\" valign=\"middle\" bgcolor=\"#5865f2\"><a href=\"https://click.discord.com/ls/click?upn=qDOo8cnwIoKzt0aLL1cBeFE1RlVCKJFF5zAq8ml-2BFh1dq-2FeX22E9yMPFmLMSO5CY89faRWhR5p2f4gO8aFsPDQ3vE2xTBhlJeGEE87p63cgiwNItAlEn-2FJFtj5yFA-2FautLWRGW0IKfxGDMHWrbeey8URRAkOrr-2BYBT-2FT5kcUfa1veZCytU-2B9wHLsndHWdUn8EtOOUBgB5uZfcE9bw5O3ZAt92B28NZ9SYzZ7jGK4jzI-3DRs1A_qHrw4GmpuuXmFxW5rh3mZJII65iIReHI98SsrMc1mgu8ShbSoZ8MmrOuOGGsGiDHIxAufqB6YPIqUicSQdng-2FHz3X4EcYlJSJWCiAZzUCcvYmGWiqeBrYsFUdcbj9tutXb-2BG-2FNwkX8P7WS7Q2pJobCyQQOkvVoRrpJG7V58-2FYRxv3qpWOuYkwFmbMMjphGS2i2dLkuOItJwH1cksLhGYWdjznem5YrL4mK3OF3tC-2BV1gMuDy55tbJ5iSEgEEBWZ1ez49a-2FDIIzEHUkcai9UP5w-3D-3D\" style=\"text-decoration:none;line-height:100%;background:#5865f2;color:white;font-family:Ubuntu, Helvetica, Arial, sans-serif;font-size:15px;font-weight:normal;text-transform:none;margin:0px;\" target=\"_blank\">\n" + " Verify Email\n" + " </a></td></tr></tbody></table></td></tr><tr><td style=\"word-break:break-word;font-size:0px;padding:30px 0px;\"><p style=\"font-size:1px;margin:0px auto;border-top:1px solid #DCDDDE;width:100%;\"></p><!--[if mso | IE]><table role=\"presentation\" align=\"center\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\" style=\"font-size:1px;margin:0px auto;border-top:1px solid #DCDDDE;width:100%;\" width=\"640\"><tr><td style=\"height:0;line-height:0;\">&nbsp;</td></tr></table><![endif]--></td></tr><tr><td style=\"word-break:break-word;font-size:0px;padding:0px;\" align=\"left\"><div style=\"cursor:auto;color:#747F8D;font-family:Whitney, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;line-height:16px;text-align:left;\">\n" + "<p>Need help? <a href=\"https://click.discord.com/ls/click?upn=qDOo8cnwIoKzt0aLL1cBeNlOcN7VC1Mue2BSa5oqYEdKm-2BPBEvWHLEUfi61TfqfxuvBipSaAkPtkAVPOEnBIzw-3D-3DAwmi_qHrw4GmpuuXmFxW5rh3mZJII65iIReHI98SsrMc1mgu8ShbSoZ8MmrOuOGGsGiDHIxAufqB6YPIqUicSQdng-2FDwgAvuv1YbBdpifu41HAMYpKNCG-2B9DJkbHJh6dVJu9B-2Fhq6a9-2Bb-2F-2FfpPxu-2B-2BUFSXxP0C06ezs4FLQUQ-2BE0NSkC92V6ZreqEWrGFcnGoFFl9g-2FnwH216S3C73vNmQNkkSTGucOGa417dqe48fbTsGecU3qOkpa4YGVUr7jzsP0-2BfU7l1fARgfixc2v61fVrGOA-3D-3D\" style=\"font-family: Whitney, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;color: #5865f2;\">Contact our support team</a> or hit us up on Twitter <a href=\"https://click.discord.com/ls/click?upn=qDOo8cnwIoKzt0aLL1cBeHLasbud5D3vi74o1Q-2B2VLcLLCDOodJpEqop-2Fc-2F5Wr6ZmwhT_qHrw4GmpuuXmFxW5rh3mZJII65iIReHI98SsrMc1mgu8ShbSoZ8MmrOuOGGsGiDHIxAufqB6YPIqUicSQdng-2FCyF1AhUtrR4uuth-2FcXmIntavlMvRzaAnv5wOU2OgE73LslLWOQr-2BreJd6EODqDvhDW1Vfkwz9tDF4v7vXkggW4RizSDgglIdEZOfSS5bC9MIP1w2aHx4hNAZGzbL8fgALc-2BVlS5PQRUTo78YViVgjh0OyWMiwTywgQ92JJlzjFBxH5kaGO4DW5oRpchrhSP6Q-3D-3D\" style=\"font-family: Whitney, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;color: #5865f2;\">@discord</a>.<br>\n" + "Want to give us feedback? Let us know what you think on our <a href=\"https://click.discord.com/ls/click?upn=qDOo8cnwIoKzt0aLL1cBeGtifxhyb-2FEeTgeN31uAkBS2ZTvlNepPcLUnXgSC4-2BGKK50d_qHrw4GmpuuXmFxW5rh3mZJII65iIReHI98SsrMc1mgu8ShbSoZ8MmrOuOGGsGiDHIxAufqB6YPIqUicSQdng-2FOwEWSPbKMa2qo4v5D1DBjT-2BpfsmGt5hJSd6hBWtFxU1Qzs9MC77TBUFgP1VMuRMncLLS0v1dNVKuZKyBi4570KK7y92u7ySo8jc4IiehMbn9LlE9OLAvB6L-2FwBsnarvlcFcWZzoF-2FXUfqkzKAeidv8bjp2uyknoeeCJsueK4IYEBV0HLWkXZU0Ju7VWqIHdSA-3D-3D\" style=\"font-family: Whitney, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;color: #5865f2;\">feedback site</a>.</p>\n\n" + "</div></td></tr></tbody></table></div><!--[if mso | IE]>\n" + " </td></tr></table>\n" + " <![endif]--></td></tr></tbody></table></div><!--[if mso | IE]>\n" + " </td></tr></table>\n" + " <![endif]-->\n" + " <!--[if mso | IE]>\n" + " <table role=\"presentation\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\" width=\"640\" align=\"center\" style=\"width:640px;\">\n" + " <tr>\n" + " <td style=\"line-height:0px;font-size:0px;mso-line-height-rule:exactly;\">\n" + " <![endif]--></div><div style=\"margin:0px auto;max-width:640px;background:transparent;\"><table role=\"presentation\" cellpadding=\"0\" cellspacing=\"0\" style=\"font-size:0px;width:100%;background:transparent;\" align=\"center\" border=\"0\"><tbody><tr><td style=\"text-align:center;vertical-align:top;direction:ltr;font-size:0px;padding:20px 0px;\"><!--[if mso | IE]>\n" + " <table role=\"presentation\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr><td style=\"vertical-align:top;width:640px;\">\n" + " <![endif]--><div aria-labelledby=\"mj-column-per-100\" class=\"mj-column-per-100 outlook-group-fix\" style=\"vertical-align:top;display:inline-block;direction:ltr;font-size:13px;text-align:left;width:100%;\"><table role=\"presentation\" cellpadding=\"0\" cellspacing=\"0\" width=\"100%\" border=\"0\"><tbody><tr><td style=\"word-break:break-word;font-size:0px;padding:0px;\" align=\"center\"><div style=\"cursor:auto;color:#99AAB5;font-family:Whitney, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;line-height:24px;text-align:center;\">\n" + " Sent by Discord •\n" + " <a href=\"https://click.discord.com/ls/click?upn=qDOo8cnwIoKzt0aLL1cBeHN2Bg5UBi6nJegCqE7rzswec30BdfDZLIuq6fJ2wlEZPvqD_qHrw4GmpuuXmFxW5rh3mZJII65iIReHI98SsrMc1mgu8ShbSoZ8MmrOuOGGsGiDHIxAufqB6YPIqUicSQdng-2FL8CYkuJZnwLKtco9SrpLcLgA4YXFbKgXYAzJ83G0yx55HBRM5IicBhzYhwNCgKYagMPnI5hSbCVrLmztcmoKV7BIs17FkQT1VXmNDPHGJKtwwJ5xGBwW1ojGi6aLanc2sj6Yd6GCjtCOIdWjar4ri9tBl2E7s5RkDn-2BqaSwkRSOLYM8KRHgmD2qV044iH0Esw-3D-3D\" style=\"color:#1EB0F4;text-decoration:none;\">check our blog</a>\n" + " • <a href=\"https://click.discord.com/ls/click?upn=qDOo8cnwIoKzt0aLL1cBeHLasbud5D3vi74o1Q-2B2VLcLLCDOodJpEqop-2Fc-2F5Wr6Z7ZFk_qHrw4GmpuuXmFxW5rh3mZJII65iIReHI98SsrMc1mgu8ShbSoZ8MmrOuOGGsGiDHIxAufqB6YPIqUicSQdng-2FHj3YsAN2EBVLb5jbZZZUDt9HBzm-2Bp8oPeOp5-2Bk3vVtUp1nHcS58a6EY-2F-2BLnmMLQf1jCAmQ-2BYiGDf2nL9lh7tCPObTHD0FCkPEEA7wXwLEAa4Dsf6V4PS8k-2FsDEZMjz6zyk9zxHSteipzFL-2F8AsexwKfN3NvafYCCwCKJLu2V7cEbbiR56xGx3Bm7QlMM1-2FLjg-3D-3D\" style=\"color:#1EB0F4;text-decoration:none;\">@discord</a>\n" + " </div></td></tr><tr><td style=\"word-break:break-word;font-size:0px;padding:0px;\" align=\"center\"><div style=\"cursor:auto;color:#99AAB5;font-family:Whitney, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;line-height:24px;text-align:center;\">\n" + " 444 De Haro Street, Suite 200, San Francisco, CA 94107\n" + " </div></td></tr><tr><td style=\"word-break:break-word;font-size:0px;padding:0px;\" align=\"left\"><div style=\"cursor:auto;color:#000000;font-family:Whitney, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;line-height:22px;text-align:left;\">\n" + " <img src=\"https://discord.com/api/science/948442403696681040/1458e1ec-fb58-4ac6-bdd1-da8d9d76387b.gif?properties=eyJlbWFpbF90eXBlIjogInVzZXJfdmVyaWZ5X2VtYWlsIn0%3D\" width=\"1\" height=\"1\">\n" + " </div></td></tr></tbody></table></div><!--[if mso | IE]>\n" + " </td></tr></table>\n" + " <![endif]--></td></tr></tbody></table></div><!--[if mso | IE]>\n" + " </td></tr></table>\n" + " <![endif]--></div>\n" + "<img src=\"https://click.discord.com/wf/open?upn=cFl-2B-2BbWYnK3zgfRShQl6Yk5t12LTKds7e07WNeUbpR3c1C9XFTGrMxjdlnrlwNoqz2BHpDIYmuxrcq1ieER-2FBSNVPnAAz9AVFigEw7ot3H7Z0E05DC7oojluNUnOdbMLy9f-2FNqSc-2BH7xVp2afvaRzdq47AooOBVdh3Ely4GwSZS1l9LNxz7PIwbuYUxsC3A-2BVsETVHrlZbqAebXnOYKJjzlQnsX9RGPpPmfcQs2bAdVXccLQxukf5K4sEfzJ4hT-2FaJ7o33yHgShdvVvp3Z99CA-3D-3D\" alt=\"\" width=\"1\" height=\"1\" border=\"0\" style=\"height:1px !important;width:1px !important;border-width:0 !important;margin-top:0 !important;margin-bottom:0 !important;margin-right:0 !important;margin-left:0 !important;padding-top:0 !important;padding-bottom:0 !important;padding-right:0 !important;padding-left:0 !important;\">\n\n" + "</body></html>"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.CASE_INSENSITIVE); final Matcher matcher = pattern.matcher(string); if (matcher.find()) { System.out.println("Full match: " + matcher.group(0)); for (int i = 1; i <= matcher.groupCount(); i++) { System.out.println("Group " + i + ": " + matcher.group(i)); } } } }

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 Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html