Regular Expressions 101

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Function

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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

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"^""|""$|\\""|\\\\"; string input = @"""sjdivfriyaaqa\xd2v\""k\""mpcu\""yyu\""en"" ""vcqc"" ""zbcwgmbpijcxu\""yins\""sfxn"" ""yumngprx"" ""bbdj"" ""czbggabkzo\""wsnw\""voklp\""s"" ""acwt"" ""aqttwnsohbzian\""evtllfxwkog\""cunzw"" ""ugvsgfv"" ""xlnillibxg"" ""kexh\""pmi"" ""syvugow"" ""m\""ktqnw"" ""yrbajyndte\\rm"" ""f\""kak\x70sn\xc4kjri"" ""yxthr"" ""alvumfsjni\""kohg"" ""trajs\x5brom\xf1yoijaumkem\""\""tahlzs"" ""\""oedr\""pwdbnnrc"" ""qsmzhnx\"" ""\""msoytqimx\\tbklqz"" ""mjdfcgwdshrehgs"" ""\""rivyxahf\"" ""ciagc\x04bp"" ""xkfc"" ""xrgcripdu\x4c\xc4gszjhrvumvz\""mngbirb"" ""gvmae\""yiiujoqvr\""mkxmgbbut\""u"" ""ih"" ""ncrqlejehs"" ""mkno\x43pcfdukmemycp"" ""uanzoqxkpsksbvdnkji\""feamp"" ""axoufpnbx\\ao\x61pfj\""b"" ""dz\\ztawzdjy"" ""ihne\""enumvswypgf"" ""\""dgazthrphbshdo\\vuqoiy\"" ""dlnmptzt\\zahwpylc\\b\""gmslrqysk"" ""mhxznyzcp"" ""rebr\""amvxw\x5fmbnfpkkeghlntavj"" ""lades\x47ncgdof\""\""jmbbk"" ""dwxuis\xa5wdkx\\z\""admgnoddpgkt\\zs"" ""g\\k\x27qsl\x34hwfglcdxqbeclt\xca\\"" ""lhyjky\\m\""pvnm\\xmynpxnlhndmahjl"" ""c\""uxabbgorrpprw\""xas\\vefkxioqpt"" ""rfrvjxpevcmma\x71gtfipo"" ""fgh\""kcwoqwfnjgdlzfclprg\""q"" ""onxnwykrba"" ""hkkg\x60f\""tjzsanpvarzgkfipl"" ""\""aintes\""ofq\""juiaqlqxmvpe\\a"" ""wiyczzs\""ciwk"" ""mfqeu"" ""v\xe1z\x7ftzalmvdmncfivrax\\rjwq"" ""k\""vtg"" ""exhrtdugeml\xf0"" ""behnchkpld"" ""mhgxy\""mfcrg\xc5gnp\""\""osqhj"" ""rlvjy"" ""awe"" ""ctwy"" ""vt"" ""\x54t"" ""zugfmmfomz"" ""cv\""cvcvfaada\x04fsuqjinbfh\xa9cq\xd2c\""d"" ""oj"" ""xazanf\""wbmcrn"" ""\\\\zkisyjpbzandqikqjqvee"" ""dpsnbzdwnxk\\v"" ""sj\""tuupr\\oyoh"" ""myvkgnw\x81q\xaaokt\\emgejbsyvxcl\\\xee"" ""ejeuqvunjcirdkkpt\""nlns"" ""twmlvwxyvfyqqzu"" ""\""xwtzdp\x98qkcis\""dm\\\""ep\""xyykq"" ""vvcq\\expok"" ""wgukjfanjgpdjb"" ""\""mjcjajnxy\\dcpc"" ""wdvgnecw\\ab\x44klceduzgsvu"" ""dqtqkukr\""iacngufbqkdpxlwjjt"" ""\""xj\""\x66qofsqzkoah"" ""nptiwwsqdep"" ""gsnlxql\x30mjl"" ""yeezwokjwrhelny\"" ""bjauamn\\izpmzqqasid"" ""tvjdbkn\""tiziw\x82r"" ""w"" ""xwoakbbnjnypnaa\xa9wft\""slrmoqkl"" ""vwxtnlvaaasyruykgygrvpiopzygf\""vq"" ""qdancvnvmhlmpj\\isdxs"" ""xzc\\elw"" ""b\""wxeqvy\""qf\""g\xcaoklsucwicyw\""dovr"" ""yomlvvjdbngz\""rly\""afr"" ""bfb\""x\""aweuwbwmoa\x13\""t\""zhr"" ""\""dmfoxb\""qvpjzzhykt\xd2\""\""ryhxi"" ""psqef\""yu\\qiflie\""\x79w"" ""arzewkej\""lqmh\\sayyusxxo\\"" ""vuvvp"" ""hc\""lg\x6bcpupsewzklai\""l"" ""cjdfygc\""auorqybnuqghsh\x10"" ""j"" ""wqjexk\""eyq\\lbroqhk\\dqzsqk"" ""dws\""ru\""dvxfiwapif\""oqwzmle"" ""agcykg\\jt\\vzklqjvknoe"" ""kksd\""jmslja\\z\""y\\b\xaagpyojct"" ""nnpipxufvbfpoz\""jno"" ""dtw"" ""xlolvtahvgqkx\\dgnhj\\spsclpcxv\\"" ""mxea\\mbjpi"" ""lgbotkk\""zmxh\\\\qji\""jszulnjsxkqf"" ""lwckmhwhx\""gmftlb\x91am"" ""xxdxqyxth"" ""\""lmqhwkjxmvayxy"" ""tf"" ""qy"" ""wdqmwxdztax\""m\""\x09\x11xdxmfwxmtqgwvf"" ""\xcbnazlf\""ghziknszmsrahaf"" ""e\x6aupmzhxlvwympgjjpdvo\""kylfa"" ""\x81vhtlillb\xactgoatva"" ""dvnlgr"" ""f"" ""xg\xfacwizsadgeclm"" ""vnnrzbtw\""\\prod\\djbyppngwayy\"" ""lrt\xf4jahwvfz"" ""aqpnjtom\""ymkak\\dadfybqrso\\fwv"" ""gz\""aac\""mrbk\""ktommrojraqh"" ""wycamwoecsftepfnlcdkm"" ""nrhddblbuzlqsl\x9cben"" ""vckxhyqkmqmdseazcykrbysm"" ""sil\xbbtevmt\""gvrvybui\""faw\""j"" ""cjex\\tp\x45pzf"" ""asjobvtxszfodgf\""ibftg"" ""gkyjyjdrxdcllnh\""sjcibenrdnxv"" ""oswsdpjyxpbwnqbcpl\""yrdvs\\zq"" ""\""\""tyowzc\\fycbp\""jbwrbvgui"" ""cbpcabqkdgzmpgcwjtrchxp"" ""iyrzfh\x45gw\""fdlfpiaap\x31xqq"" ""evgksznidz"" ""b\\w\\"" ""loufizbiy\x57aim\""bgk"" ""qjfyk"" ""g\""anmloghvgr\x07zwqougqhdz"" ""usbbmwcxd\\bdgg"" ""htitqcpczml"" ""eke\\cqvpexqqk\""to\""tqmljrpn\xe6lji\"" ""g\xd2ifdsej"" ""h\""sk\""haajajpagtcqnzrfqn\xe6btzo"" ""wfkuffdxlvm\\cvlyzlbyunclhmpp"" ""myaavh\""spue"" ""hqvez\x68d\""eo\""eaioh"" ""s\""qd\""oyxxcglcdnuhk"" ""ilqvar"" ""srh"" ""puuifxrfmpc\""bvalwi\x2blu\\"" ""yywlbutufzysbncw\\nqsfbhpz\""mngjq"" ""zbl\\jfcuop"" ""hjdouiragzvxsqkreup\\"" ""qi"" ""ckx\\funlj\xa7ahi"" ""k"" ""ufrcnh\""ajteit"" ""cqv\""bgjozjj\x60x\xa8yhvmdvutchjotyuz"" ""hkuiet\""oku\x8cfhumfpasl"" ""\""\\sbe\x4d"" ""vhknazqt"" ""eyyizvzcahgflvmoowvs\\jhvygci"" ""kki\x3ewcefkgtjap\""xtpxh\""lzepoqj"" ""wvtk"" ""\""ynet"" ""zh\\obk\""otagx\x59txfzf"" ""ocowhxlx\xe6zqg\x63wx\\tclkhq\\vmaze"" ""w\""cf"" ""qpniprnrzrnvykghqnalr"" ""jctcqra\""\x05dhlydpqamorqjsijt\\xjdgt"" ""sig"" ""qhlbidbflwxe\""xljbwls\x20vht"" ""irmrebfla\xefsg\""j"" ""nep"" ""hjuvsqlizeqobepf"" ""guzbcdp\""obyh"" ""\""mjagins\xf9tqykaxy\"" ""knvsdnmtr\""zervsb"" ""hzuy"" ""zza\""k\""buapb\\elm\xfeya"" ""lrqar\""dfqwkaaqifig\""uixjsz"" ""\""azuo\x40rmnlhhluwsbbdb\x32pk\\yu\""pbcf"" ""dplkdyty"" ""rfoyciebwlwphcycmguc"" ""ivnmmiemhgytmlprq\\eh"" ""lhkyzaaothfdhmbpsqd\\yyw"" ""tnlzifupcjcaj"" ""\\qiyirsdrfpmu\\\x15xusifaag"" ""\\lcomf\\s"" ""uramjivcirjhqcqcg"" ""kkbaklbxfxikffnuhtu\xc6t\""d"" ""n\xefai"" ""\""toy\""bnbpevuzoc\""muywq\""gz\""grbm"" ""\""muu\\wt"" ""\\srby\""ee"" ""erf\""gvw\""swfppf"" ""pbqcgtn\""iuianhcdazfvmidn\\nslhxdf"" ""uxbp"" ""up\\mgrcyaegiwmjufn"" ""nulscgcewj\\dvoyvhetdegzhs\"" ""masv\""k\\rzrb"" ""qtx\x79d\""xdxmbxrvhj"" ""fid\\otpkgjlh\""qgsvexrckqtn\xf4"" ""tagzu"" ""bvl\\\""noseec"" ""\\xgicuuh"" ""w\""a\""npemf"" ""sxp"" ""nsmpktic\x8awxftscdcvijjobnq\""gjd"" ""uks\""\""jxvyvfezz\""aynxoev\""cuoav"" ""m"" ""lkvokj"" ""vkfam\""yllr\""q\x92o\x4ebecnvhshhqe\\"" ""efdxcjkjverw"" ""lmqzadwhfdgmep\x02tzfcbgrbfekhat"" ""cpbk\x9azqegbpluczssouop\x36ztpuoxsw"" ""cqwoczxdd\""erdjka"" ""cwvqnjgbw\\fxdlby"" ""mvtm"" ""lt\""bbqzpumplkg"" ""ntd\xeeuwweucnuuslqfzfq"" ""y\xabl\""dbebxjrlbmuoo\\\x1au"" ""qjoqx\\a"" ""pu\""ekdnfpmly\xbago\"" ""fjhhdy"" ""arl"" ""xcywisim\""bwuwf\""\""raepeawwjub"" ""pbe"" ""dbnqfpzyaumxtqnd\xc5dcqrkwyop"" ""ojv\x40vtkwgkqepm\x8bzft\\vedrry"" ""wggqkfbwqumsgajqwphjec\""mstxpwz"" ""zjkbem"" ""icpfqxbelxazlls"" ""pvpqs\\abcmtyielugfgcv\""tjxapxqxnx"" ""oqddwlvmtv\""\x39lyybylfb\""jmngnpjrdw"" ""gisgbve"" ""\""aglg"" ""y\""\""ss\xafvhxlrjv"" ""qbgqjsra"" ""ihshbjgqpdcljpmdwdprwloy"" ""djja\\wcdn\""svkrgpqn\""uz\""hc\x43hj"" ""cbjm"" ""pnn"" ""pqvh\""noh"" ""\""\\fdktlp"" ""ncea"" ""pqgzphiyy"" ""\xbedovhxuipaohlcvkwtxwmpz\""ckaif\""r"" ""arjuzbjowqciunfwgxtph\""vlhy\""n"" ""c"" ""nrpdxunulgudqzlhtae"" ""iefheu\""uru\"" ""aqijysxuijud\""np\\opbichhudil\xbesum"" ""pfpevmtstl\""lde\""bzr\""vspdxs"" ""vparfbdjwvzsocpnzhp"" ""g\x4ffxaarafrsjthq\\\xc1rw"" ""ng\\rqx\\gwpzucbh\xafl"" ""rw\""nf\\dna"" ""jkkeahxurxla\\g\xb3czrlsyimmwcwthr"" ""twaailoypu\""oas\""kpuuyedlaw\\\xb0vzt"" ""hznex\\gdiqvtugi"" ""imdibsunjeswhk"" ""ta\\icileuzpxro\""cfmv\""mzp"" ""coykr\x57luiysucfaflmilhlehmvzeiepo"" ""u\x3dfh\xd4yt"" ""piw\x1bz\""eowy\""vfk\""wqiekw"" ""gan\""y"" ""p\""bevidoazcznr\""hddxuuq\"" ""bwzucczznutbxe"" ""z\""viqgyqjisior\\iecosmjbknol"" ""dmlpcglcfkfsctxydjvayhymv\x3c\\gp"" ""bfvkqrintbbvgfv"" ""xlzntrgdck\""cprc\xadczyarbznqmuhxyuh"" ""uqdxnuwioc\""kdytxq\\ig"" ""xrafmucpmfi"" ""vr\""hltmfrge"" ""eonf\""nt\\wtcnsocs"" ""j\xb7xoslyjeyjksplkqixncgkylkw"" ""njw\""pefgfbez\x9axshdmplxzquqe"" ""di\x58bvptfsafirpc"" ""l\x1fkco"" ""x"" ""mprndo\""n"" ""psegit"" ""svbdnkkuuqs\""sqxu\""oqcyz\""aizashk"" ""cwkljukxer\\\""\\nff\""esjwiyaoy"" ""ilxrkgbjjxpvhdtq\""cpiuoofdnkpp"" ""hlngi\""ulxep\\qohtmqnqjb\""rkgerho"" ""gxws\""bcgm\""p"" ""bv\""mds\\zhfusiepgrz\\b\x32fscdzz"" ""l\xfampwtme\x69qvxnx\""\""\xc4jruuymjxrpsv"" ""qqmxhrn"" ""xziq\\\x18ybyv\x9am\""neacoqjzytertisysza"" ""aqcbvlvcrzceeyx\\j\""\""x"" ""yjuhhb"" ""\x5em\""squulpy"" ""dpbntplgmwb"" ""utsgfkm\\vbftjknlktpthoeo"" ""ccxjgiocmuhf\""ycnh"" ""lltj\""kbbxi"""; RegexOptions options = RegexOptions.Multiline; foreach (Match m in Regex.Matches(input, pattern, options)) { Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index); } } }

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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx