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

/
/
mg

Test String

Code Generator

Language

Generated Code

const regex = /2_a Von Firma:(?:(?!\b(?:AFG|ALA|ALB|DZA|ASM|AND|AGO|AIA|ATA|ATG|ARG|ARM|ABW|AUS|AUT|AZE|BHS|BHR|BGD|BRB|BLR|BEL|BLZ|BEN|BMU|BTN|BOL|BES|BIH|BWA|BVT|BRA|IOT|BRN|BGR|BFA|BDI|CPV|KHM|CMR|CAN|CPV|CYM|CAF|TCD|CHL|CHN|TWN|CXR|CCK|COL|COM|COD|COG|COK|CRI|CIV|HRV|CUB|CUW|CYP|CZE|KOR|COG|DNK|DJI|DMA|DOM|ECU|EGY|SLV|GNQ|ERI|EST|SWZ|ETH|FLK|FRO|FJI|FIN|FRA|GUF|PYF|ATF|GAB|GMB|GEO|DEU|GHA|GIB|GBR|GRC|GRL|GRD|GLP|GUM|GTM|GGY|GIN|GNB|GUY|HTI|HMD|VAT|HND|HKG|HUN|ISL|IND|IDN|IRN|IRQ|IRL|IMN|ISR|ITA|JAM|SJM|JPN|JEY|JOR|KAZ|KEN|KIR|PRK|KOR|KWT|KGZ|LAO|LVA|LBN|LSO|LBR|LBY|LIE|LTU|LUX|MAC|MKD|MDG|MWI|MYS|MDV|MLI|MLT|MHL|MTQ|MRT|MUS|MYT|MEX|FSM|MDA|MCO|MNG|MNE|MSR|MAR|MOZ|MMR|NAM|NRU|NPL|NLD|NCL|NZL|NIC|NER|NGA|NIU|NFK|MNP|NOR|OMN|PAK|PLW|PSE|PAN|PNG|PRY|PRC|PER|PHL|PCN|POL|PRT|PRI|QAT|TWN|KOR|COG|REU|ROU|RUS|RWA|ESH|BLM|SHN|KNA|LCA|MAF|SPM|VCT|WSM|SMR|STP|SAU|SEN|SRB|SYC|SLE|SGP|SXM|SVK|SVN|SLB|SOM|ZAF|SGS|KOR|SSD|ESP|LKA|SDN|SUR|SJM|SWE|CHE|SYR|TWN|TJK|TZA|THA|TLS|TGO|TKL|TON|TTO|TUN|TUR|TKM|TCA|TUV|UGA|UKR|ARE|GBR|UMI|USA|VIR|URY|UZB|VUT|VEN|VNM|VGB|VIR|WLF|ESH|YEM|ZMB|ZWE)).)*\b(AFG|ALA|ALB|DZA|ASM|AND|AGO|AIA|ATA|ATG|ARG|ARM|ABW|AUS|AUT|AZE|BHS|BHR|BGD|BRB|BLR|BEL|BLZ|BEN|BMU|BTN|BOL|BES|BIH|BWA|BVT|BRA|IOT|BRN|BGR|BFA|BDI|CPV|KHM|CMR|CAN|CPV|CYM|CAF|TCD|CHL|CHN|TWN|CXR|CCK|COL|COM|COD|COG|COK|CRI|CIV|HRV|CUB|CUW|CYP|CZE|KOR|COG|DNK|DJI|DMA|DOM|ECU|EGY|SLV|GNQ|ERI|EST|SWZ|ETH|FLK|FRO|FJI|FIN|FRA|GUF|PYF|ATF|GAB|GMB|GEO|DEU|GHA|GIB|GBR|GRC|GRL|GRD|GLP|GUM|GTM|GGY|GIN|GNB|GUY|HTI|HMD|VAT|HND|HKG|HUN|ISL|IND|IDN|IRN|IRQ|IRL|IMN|ISR|ITA|JAM|SJM|JPN|JEY|JOR|KAZ|KEN|KIR|PRK|KOR|KWT|KGZ|LAO|LVA|LBN|LSO|LBR|LBY|LIE|LTU|LUX|MAC|MKD|MDG|MWI|MYS|MDV|MLI|MLT|MHL|MTQ|MRT|MUS|MYT|MEX|FSM|MDA|MCO|MNG|MNE|MSR|MAR|MOZ|MMR|NAM|NRU|NPL|NLD|NCL|NZL|NIC|NER|NGA|NIU|NFK|MNP|NOR|OMN|PAK|PLW|PSE|PAN|PNG|PRY|PRC|PER|PHL|PCN|POL|PRT|PRI|QAT|TWN|KOR|COG|REU|ROU|RUS|RWA|ESH|BLM|SHN|KNA|LCA|MAF|SPM|VCT|WSM|SMR|STP|SAU|SEN|SRB|SYC|SLE|SGP|SXM|SVK|SVN|SLB|SOM|ZAF|SGS|KOR|SSD|ESP|LKA|SDN|SUR|SJM|SWE|CHE|SYR|TWN|TJK|TZA|THA|TLS|TGO|TKL|TON|TTO|TUN|TUR|TKM|TCA|TUV|UGA|UKR|ARE|GBR|UMI|USA|VIR|URY|UZB|VUT|VEN|VNM|VGB|VIR|WLF|ESH|YEM|ZMB|ZWE)?$/mg; // Alternative syntax using RegExp constructor // const regex = new RegExp('2_a Von Firma:(?:(?!\\b(?:AFG|ALA|ALB|DZA|ASM|AND|AGO|AIA|ATA|ATG|ARG|ARM|ABW|AUS|AUT|AZE|BHS|BHR|BGD|BRB|BLR|BEL|BLZ|BEN|BMU|BTN|BOL|BES|BIH|BWA|BVT|BRA|IOT|BRN|BGR|BFA|BDI|CPV|KHM|CMR|CAN|CPV|CYM|CAF|TCD|CHL|CHN|TWN|CXR|CCK|COL|COM|COD|COG|COK|CRI|CIV|HRV|CUB|CUW|CYP|CZE|KOR|COG|DNK|DJI|DMA|DOM|ECU|EGY|SLV|GNQ|ERI|EST|SWZ|ETH|FLK|FRO|FJI|FIN|FRA|GUF|PYF|ATF|GAB|GMB|GEO|DEU|GHA|GIB|GBR|GRC|GRL|GRD|GLP|GUM|GTM|GGY|GIN|GNB|GUY|HTI|HMD|VAT|HND|HKG|HUN|ISL|IND|IDN|IRN|IRQ|IRL|IMN|ISR|ITA|JAM|SJM|JPN|JEY|JOR|KAZ|KEN|KIR|PRK|KOR|KWT|KGZ|LAO|LVA|LBN|LSO|LBR|LBY|LIE|LTU|LUX|MAC|MKD|MDG|MWI|MYS|MDV|MLI|MLT|MHL|MTQ|MRT|MUS|MYT|MEX|FSM|MDA|MCO|MNG|MNE|MSR|MAR|MOZ|MMR|NAM|NRU|NPL|NLD|NCL|NZL|NIC|NER|NGA|NIU|NFK|MNP|NOR|OMN|PAK|PLW|PSE|PAN|PNG|PRY|PRC|PER|PHL|PCN|POL|PRT|PRI|QAT|TWN|KOR|COG|REU|ROU|RUS|RWA|ESH|BLM|SHN|KNA|LCA|MAF|SPM|VCT|WSM|SMR|STP|SAU|SEN|SRB|SYC|SLE|SGP|SXM|SVK|SVN|SLB|SOM|ZAF|SGS|KOR|SSD|ESP|LKA|SDN|SUR|SJM|SWE|CHE|SYR|TWN|TJK|TZA|THA|TLS|TGO|TKL|TON|TTO|TUN|TUR|TKM|TCA|TUV|UGA|UKR|ARE|GBR|UMI|USA|VIR|URY|UZB|VUT|VEN|VNM|VGB|VIR|WLF|ESH|YEM|ZMB|ZWE)).)*\\b(AFG|ALA|ALB|DZA|ASM|AND|AGO|AIA|ATA|ATG|ARG|ARM|ABW|AUS|AUT|AZE|BHS|BHR|BGD|BRB|BLR|BEL|BLZ|BEN|BMU|BTN|BOL|BES|BIH|BWA|BVT|BRA|IOT|BRN|BGR|BFA|BDI|CPV|KHM|CMR|CAN|CPV|CYM|CAF|TCD|CHL|CHN|TWN|CXR|CCK|COL|COM|COD|COG|COK|CRI|CIV|HRV|CUB|CUW|CYP|CZE|KOR|COG|DNK|DJI|DMA|DOM|ECU|EGY|SLV|GNQ|ERI|EST|SWZ|ETH|FLK|FRO|FJI|FIN|FRA|GUF|PYF|ATF|GAB|GMB|GEO|DEU|GHA|GIB|GBR|GRC|GRL|GRD|GLP|GUM|GTM|GGY|GIN|GNB|GUY|HTI|HMD|VAT|HND|HKG|HUN|ISL|IND|IDN|IRN|IRQ|IRL|IMN|ISR|ITA|JAM|SJM|JPN|JEY|JOR|KAZ|KEN|KIR|PRK|KOR|KWT|KGZ|LAO|LVA|LBN|LSO|LBR|LBY|LIE|LTU|LUX|MAC|MKD|MDG|MWI|MYS|MDV|MLI|MLT|MHL|MTQ|MRT|MUS|MYT|MEX|FSM|MDA|MCO|MNG|MNE|MSR|MAR|MOZ|MMR|NAM|NRU|NPL|NLD|NCL|NZL|NIC|NER|NGA|NIU|NFK|MNP|NOR|OMN|PAK|PLW|PSE|PAN|PNG|PRY|PRC|PER|PHL|PCN|POL|PRT|PRI|QAT|TWN|KOR|COG|REU|ROU|RUS|RWA|ESH|BLM|SHN|KNA|LCA|MAF|SPM|VCT|WSM|SMR|STP|SAU|SEN|SRB|SYC|SLE|SGP|SXM|SVK|SVN|SLB|SOM|ZAF|SGS|KOR|SSD|ESP|LKA|SDN|SUR|SJM|SWE|CHE|SYR|TWN|TJK|TZA|THA|TLS|TGO|TKL|TON|TTO|TUN|TUR|TKM|TCA|TUV|UGA|UKR|ARE|GBR|UMI|USA|VIR|URY|UZB|VUT|VEN|VNM|VGB|VIR|WLF|ESH|YEM|ZMB|ZWE)?$', 'mg') const str = `1_a rwbvwhivvwvww 1_b wvwvwvwvwr 1_c uzmzmzumnrb5 ----------------------- vvwvrehbtrzRgrrgr ------------------------- 2_a Von Firma: Not Paul Company in AUT 2_b vwvmkmwkmkrmee 2_c bioennnneoroneb 2_d ntumuz 2_a Von Firma: Not Paul Company in`; // 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