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

/
/
g

Test String

Code Generator

Language

Generated Code

const regex = /[\0-\x1F\x7F-\x9F\xAD\u0378\u0379\u037F-\u0383\u038B\u038D\u03A2\u0528-\u0530\u0557\u0558\u0560\u0588\u058B-\u058E\u0590\u05C8-\u05CF\u05EB-\u05EF\u05F5-\u0605\u061C\u061D\u06DD\u070E\u070F\u074B\u074C\u07B2-\u07BF\u07FB-\u07FF\u082E\u082F\u083F\u085C\u085D\u085F-\u089F\u08A1\u08AD-\u08E3\u08FF\u0978\u0980\u0984\u098D\u098E\u0991\u0992\u09A9\u09B1\u09B3-\u09B5\u09BA\u09BB\u09C5\u09C6\u09C9\u09CA\u09CF-\u09D6\u09D8-\u09DB\u09DE\u09E4\u09E5\u09FC-\u0A00\u0A04\u0A0B-\u0A0E\u0A11\u0A12\u0A29\u0A31\u0A34\u0A37\u0A3A\u0A3B\u0A3D\u0A43-\u0A46\u0A49\u0A4A\u0A4E-\u0A50\u0A52-\u0A58\u0A5D\u0A5F-\u0A65\u0A76-\u0A80\u0A84\u0A8E\u0A92\u0AA9\u0AB1\u0AB4\u0ABA\u0ABB\u0AC6\u0ACA\u0ACE\u0ACF\u0AD1-\u0ADF\u0AE4\u0AE5\u0AF2-\u0B00\u0B04\u0B0D\u0B0E\u0B11\u0B12\u0B29\u0B31\u0B34\u0B3A\u0B3B\u0B45\u0B46\u0B49\u0B4A\u0B4E-\u0B55\u0B58-\u0B5B\u0B5E\u0B64\u0B65\u0B78-\u0B81\u0B84\u0B8B-\u0B8D\u0B91\u0B96-\u0B98\u0B9B\u0B9D\u0BA0-\u0BA2\u0BA5-\u0BA7\u0BAB-\u0BAD\u0BBA-\u0BBD\u0BC3-\u0BC5\u0BC9\u0BCE\u0BCF\u0BD1-\u0BD6\u0BD8-\u0BE5\u0BFB-\u0C00\u0C04\u0C0D\u0C11\u0C29\u0C34\u0C3A-\u0C3C\u0C45\u0C49\u0C4E-\u0C54\u0C57\u0C5A-\u0C5F\u0C64\u0C65\u0C70-\u0C77\u0C80\u0C81\u0C84\u0C8D\u0C91\u0CA9\u0CB4\u0CBA\u0CBB\u0CC5\u0CC9\u0CCE-\u0CD4\u0CD7-\u0CDD\u0CDF\u0CE4\u0CE5\u0CF0\u0CF3-\u0D01\u0D04\u0D0D\u0D11\u0D3B\u0D3C\u0D45\u0D49\u0D4F-\u0D56\u0D58-\u0D5F\u0D64\u0D65\u0D76-\u0D78\u0D80\u0D81\u0D84\u0D97-\u0D99\u0DB2\u0DBC\u0DBE\u0DBF\u0DC7-\u0DC9\u0DCB-\u0DCE\u0DD5\u0DD7\u0DE0-\u0DF1\u0DF5-\u0E00\u0E3B-\u0E3E\u0E5C-\u0E80\u0E83\u0E85\u0E86\u0E89\u0E8B\u0E8C\u0E8E-\u0E93\u0E98\u0EA0\u0EA4\u0EA6\u0EA8\u0EA9\u0EAC\u0EBA\u0EBE\u0EBF\u0EC5\u0EC7\u0ECE\u0ECF\u0EDA\u0EDB\u0EE0-\u0EFF\u0F48\u0F6D-\u0F70\u0F98\u0FBD\u0FCD\u0FDB-\u0FFF\u10C6\u10C8-\u10CC\u10CE\u10CF\u1249\u124E\u124F\u1257\u1259\u125E\u125F\u1289\u128E\u128F\u12B1\u12B6\u12B7\u12BF\u12C1\u12C6\u12C7\u12D7\u1311\u1316\u1317\u135B\u135C\u137D-\u137F\u139A-\u139F\u13F5-\u13FF\u169D-\u169F\u16F1-\u16FF\u170D\u1715-\u171F\u1737-\u173F\u1754-\u175F\u176D\u1771\u1774-\u177F\u17DE\u17DF\u17EA-\u17EF\u17FA-\u17FF\u180F\u181A-\u181F\u1878-\u187F\u18AB-\u18AF\u18F6-\u18FF\u191D-\u191F\u192C-\u192F\u193C-\u193F\u1941-\u1943\u196E\u196F\u1975-\u197F\u19AC-\u19AF\u19CA-\u19CF\u19DB-\u19DD\u1A1C\u1A1D\u1A5F\u1A7D\u1A7E\u1A8A-\u1A8F\u1A9A-\u1A9F\u1AAE-\u1AFF\u1B4C-\u1B4F\u1B7D-\u1B7F\u1BF4-\u1BFB\u1C38-\u1C3A\u1C4A-\u1C4C\u1C80-\u1CBF\u1CC8-\u1CCF\u1CF7-\u1CFF\u1DE7-\u1DFB\u1F16\u1F17\u1F1E\u1F1F\u1F46\u1F47\u1F4E\u1F4F\u1F58\u1F5A\u1F5C\u1F5E\u1F7E\u1F7F\u1FB5\u1FC5\u1FD4\u1FD5\u1FDC\u1FF0\u1FF1\u1FF5\u1FFF\u200B-\u200F\u202A-\u202E\u2060-\u206F\u2072\u2073\u208F\u209D-\u209F\u20BB-\u20CF\u20F1-\u20FF\u218A-\u218F\u23F4-\u23FF\u2427-\u243F\u244B-\u245F\u2700\u2B4D-\u2B4F\u2B5A-\u2BFF\u2C2F\u2C5F\u2CF4-\u2CF8\u2D26\u2D28-\u2D2C\u2D2E\u2D2F\u2D68-\u2D6E\u2D71-\u2D7E\u2D97-\u2D9F\u2DA7\u2DAF\u2DB7\u2DBF\u2DC7\u2DCF\u2DD7\u2DDF\u2E3C-\u2E7F\u2E9A\u2EF4-\u2EFF\u2FD6-\u2FEF\u2FFC-\u2FFF\u3040\u3097\u3098\u3100-\u3104\u312E-\u3130\u318F\u31BB-\u31BF\u31E4-\u31EF\u321F\u32FF\u4DB6-\u4DBF\u9FCD-\u9FFF\uA48D-\uA48F\uA4C7-\uA4CF\uA62C-\uA63F\uA698-\uA69E\uA6F8-\uA6FF\uA78F\uA794-\uA79F\uA7AB-\uA7F7\uA82C-\uA82F\uA83A-\uA83F\uA878-\uA87F\uA8C5-\uA8CD\uA8DA-\uA8DF\uA8FC-\uA8FF\uA954-\uA95E\uA97D-\uA97F\uA9CE\uA9DA-\uA9DD\uA9E0-\uA9FF\uAA37-\uAA3F\uAA4E\uAA4F\uAA5A\uAA5B\uAA7C-\uAA7F\uAAC3-\uAADA\uAAF7-\uAB00\uAB07\uAB08\uAB0F\uAB10\uAB17-\uAB1F\uAB27\uAB2F-\uABBF\uABEE\uABEF\uABFA-\uABFF\uD7A4-\uD7AF\uD7C7-\uD7CA\uD7FC-\uF8FF\uFA6E\uFA6F\uFADA-\uFAFF\uFB07-\uFB12\uFB18-\uFB1C\uFB37\uFB3D\uFB3F\uFB42\uFB45\uFBC2-\uFBD2\uFD40-\uFD4F\uFD90\uFD91\uFDC8-\uFDEF\uFDFE\uFDFF\uFE1A-\uFE1F\uFE27-\uFE2F\uFE53\uFE67\uFE6C-\uFE6F\uFE75\uFEFD-\uFF00\uFFBF-\uFFC1\uFFC8\uFFC9\uFFD0\uFFD1\uFFD8\uFFD9\uFFDD-\uFFDF\uFFE7\uFFEF-\uFFFB\uFFFE\uFFFF]/g; // Alternative syntax using RegExp constructor // const regex = new RegExp('[\\0-\\x1F\\x7F-\\x9F\\xAD\\u0378\\u0379\\u037F-\\u0383\\u038B\\u038D\\u03A2\\u0528-\\u0530\\u0557\\u0558\\u0560\\u0588\\u058B-\\u058E\\u0590\\u05C8-\\u05CF\\u05EB-\\u05EF\\u05F5-\\u0605\\u061C\\u061D\\u06DD\\u070E\\u070F\\u074B\\u074C\\u07B2-\\u07BF\\u07FB-\\u07FF\\u082E\\u082F\\u083F\\u085C\\u085D\\u085F-\\u089F\\u08A1\\u08AD-\\u08E3\\u08FF\\u0978\\u0980\\u0984\\u098D\\u098E\\u0991\\u0992\\u09A9\\u09B1\\u09B3-\\u09B5\\u09BA\\u09BB\\u09C5\\u09C6\\u09C9\\u09CA\\u09CF-\\u09D6\\u09D8-\\u09DB\\u09DE\\u09E4\\u09E5\\u09FC-\\u0A00\\u0A04\\u0A0B-\\u0A0E\\u0A11\\u0A12\\u0A29\\u0A31\\u0A34\\u0A37\\u0A3A\\u0A3B\\u0A3D\\u0A43-\\u0A46\\u0A49\\u0A4A\\u0A4E-\\u0A50\\u0A52-\\u0A58\\u0A5D\\u0A5F-\\u0A65\\u0A76-\\u0A80\\u0A84\\u0A8E\\u0A92\\u0AA9\\u0AB1\\u0AB4\\u0ABA\\u0ABB\\u0AC6\\u0ACA\\u0ACE\\u0ACF\\u0AD1-\\u0ADF\\u0AE4\\u0AE5\\u0AF2-\\u0B00\\u0B04\\u0B0D\\u0B0E\\u0B11\\u0B12\\u0B29\\u0B31\\u0B34\\u0B3A\\u0B3B\\u0B45\\u0B46\\u0B49\\u0B4A\\u0B4E-\\u0B55\\u0B58-\\u0B5B\\u0B5E\\u0B64\\u0B65\\u0B78-\\u0B81\\u0B84\\u0B8B-\\u0B8D\\u0B91\\u0B96-\\u0B98\\u0B9B\\u0B9D\\u0BA0-\\u0BA2\\u0BA5-\\u0BA7\\u0BAB-\\u0BAD\\u0BBA-\\u0BBD\\u0BC3-\\u0BC5\\u0BC9\\u0BCE\\u0BCF\\u0BD1-\\u0BD6\\u0BD8-\\u0BE5\\u0BFB-\\u0C00\\u0C04\\u0C0D\\u0C11\\u0C29\\u0C34\\u0C3A-\\u0C3C\\u0C45\\u0C49\\u0C4E-\\u0C54\\u0C57\\u0C5A-\\u0C5F\\u0C64\\u0C65\\u0C70-\\u0C77\\u0C80\\u0C81\\u0C84\\u0C8D\\u0C91\\u0CA9\\u0CB4\\u0CBA\\u0CBB\\u0CC5\\u0CC9\\u0CCE-\\u0CD4\\u0CD7-\\u0CDD\\u0CDF\\u0CE4\\u0CE5\\u0CF0\\u0CF3-\\u0D01\\u0D04\\u0D0D\\u0D11\\u0D3B\\u0D3C\\u0D45\\u0D49\\u0D4F-\\u0D56\\u0D58-\\u0D5F\\u0D64\\u0D65\\u0D76-\\u0D78\\u0D80\\u0D81\\u0D84\\u0D97-\\u0D99\\u0DB2\\u0DBC\\u0DBE\\u0DBF\\u0DC7-\\u0DC9\\u0DCB-\\u0DCE\\u0DD5\\u0DD7\\u0DE0-\\u0DF1\\u0DF5-\\u0E00\\u0E3B-\\u0E3E\\u0E5C-\\u0E80\\u0E83\\u0E85\\u0E86\\u0E89\\u0E8B\\u0E8C\\u0E8E-\\u0E93\\u0E98\\u0EA0\\u0EA4\\u0EA6\\u0EA8\\u0EA9\\u0EAC\\u0EBA\\u0EBE\\u0EBF\\u0EC5\\u0EC7\\u0ECE\\u0ECF\\u0EDA\\u0EDB\\u0EE0-\\u0EFF\\u0F48\\u0F6D-\\u0F70\\u0F98\\u0FBD\\u0FCD\\u0FDB-\\u0FFF\\u10C6\\u10C8-\\u10CC\\u10CE\\u10CF\\u1249\\u124E\\u124F\\u1257\\u1259\\u125E\\u125F\\u1289\\u128E\\u128F\\u12B1\\u12B6\\u12B7\\u12BF\\u12C1\\u12C6\\u12C7\\u12D7\\u1311\\u1316\\u1317\\u135B\\u135C\\u137D-\\u137F\\u139A-\\u139F\\u13F5-\\u13FF\\u169D-\\u169F\\u16F1-\\u16FF\\u170D\\u1715-\\u171F\\u1737-\\u173F\\u1754-\\u175F\\u176D\\u1771\\u1774-\\u177F\\u17DE\\u17DF\\u17EA-\\u17EF\\u17FA-\\u17FF\\u180F\\u181A-\\u181F\\u1878-\\u187F\\u18AB-\\u18AF\\u18F6-\\u18FF\\u191D-\\u191F\\u192C-\\u192F\\u193C-\\u193F\\u1941-\\u1943\\u196E\\u196F\\u1975-\\u197F\\u19AC-\\u19AF\\u19CA-\\u19CF\\u19DB-\\u19DD\\u1A1C\\u1A1D\\u1A5F\\u1A7D\\u1A7E\\u1A8A-\\u1A8F\\u1A9A-\\u1A9F\\u1AAE-\\u1AFF\\u1B4C-\\u1B4F\\u1B7D-\\u1B7F\\u1BF4-\\u1BFB\\u1C38-\\u1C3A\\u1C4A-\\u1C4C\\u1C80-\\u1CBF\\u1CC8-\\u1CCF\\u1CF7-\\u1CFF\\u1DE7-\\u1DFB\\u1F16\\u1F17\\u1F1E\\u1F1F\\u1F46\\u1F47\\u1F4E\\u1F4F\\u1F58\\u1F5A\\u1F5C\\u1F5E\\u1F7E\\u1F7F\\u1FB5\\u1FC5\\u1FD4\\u1FD5\\u1FDC\\u1FF0\\u1FF1\\u1FF5\\u1FFF\\u200B-\\u200F\\u202A-\\u202E\\u2060-\\u206F\\u2072\\u2073\\u208F\\u209D-\\u209F\\u20BB-\\u20CF\\u20F1-\\u20FF\\u218A-\\u218F\\u23F4-\\u23FF\\u2427-\\u243F\\u244B-\\u245F\\u2700\\u2B4D-\\u2B4F\\u2B5A-\\u2BFF\\u2C2F\\u2C5F\\u2CF4-\\u2CF8\\u2D26\\u2D28-\\u2D2C\\u2D2E\\u2D2F\\u2D68-\\u2D6E\\u2D71-\\u2D7E\\u2D97-\\u2D9F\\u2DA7\\u2DAF\\u2DB7\\u2DBF\\u2DC7\\u2DCF\\u2DD7\\u2DDF\\u2E3C-\\u2E7F\\u2E9A\\u2EF4-\\u2EFF\\u2FD6-\\u2FEF\\u2FFC-\\u2FFF\\u3040\\u3097\\u3098\\u3100-\\u3104\\u312E-\\u3130\\u318F\\u31BB-\\u31BF\\u31E4-\\u31EF\\u321F\\u32FF\\u4DB6-\\u4DBF\\u9FCD-\\u9FFF\\uA48D-\\uA48F\\uA4C7-\\uA4CF\\uA62C-\\uA63F\\uA698-\\uA69E\\uA6F8-\\uA6FF\\uA78F\\uA794-\\uA79F\\uA7AB-\\uA7F7\\uA82C-\\uA82F\\uA83A-\\uA83F\\uA878-\\uA87F\\uA8C5-\\uA8CD\\uA8DA-\\uA8DF\\uA8FC-\\uA8FF\\uA954-\\uA95E\\uA97D-\\uA97F\\uA9CE\\uA9DA-\\uA9DD\\uA9E0-\\uA9FF\\uAA37-\\uAA3F\\uAA4E\\uAA4F\\uAA5A\\uAA5B\\uAA7C-\\uAA7F\\uAAC3-\\uAADA\\uAAF7-\\uAB00\\uAB07\\uAB08\\uAB0F\\uAB10\\uAB17-\\uAB1F\\uAB27\\uAB2F-\\uABBF\\uABEE\\uABEF\\uABFA-\\uABFF\\uD7A4-\\uD7AF\\uD7C7-\\uD7CA\\uD7FC-\\uF8FF\\uFA6E\\uFA6F\\uFADA-\\uFAFF\\uFB07-\\uFB12\\uFB18-\\uFB1C\\uFB37\\uFB3D\\uFB3F\\uFB42\\uFB45\\uFBC2-\\uFBD2\\uFD40-\\uFD4F\\uFD90\\uFD91\\uFDC8-\\uFDEF\\uFDFE\\uFDFF\\uFE1A-\\uFE1F\\uFE27-\\uFE2F\\uFE53\\uFE67\\uFE6C-\\uFE6F\\uFE75\\uFEFD-\\uFF00\\uFFBF-\\uFFC1\\uFFC8\\uFFC9\\uFFD0\\uFFD1\\uFFD8\\uFFD9\\uFFDD-\\uFFDF\\uFFE7\\uFFEF-\\uFFFB\\uFFFE\\uFFFF]', 'g') const str = `a asdflkn adflkjawelkfj `; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }

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 JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions