Please enable JavaScript to use regex101
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Regular Expression
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^[a-z][a-z0-9]*(([A-Z][a-z0-9]+)*[A-Z]?|([a-z0-9]+[A-Z])*|[A-Z])$
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gm
Input 1
1
New
snake_case PascalCase 2PascalCase streamIOIO gREATERDtha modeADFAFdsADFads aBabcABCDabcABC modeADFdsADFads streamIO aBCabcABCabcA aBCabcA aabcABC deviceSNS pathASNs dscpCP awsVPC deviceID gREA1 gREAt gREAtREAt aABC modeADFsADFads modeADFads createAMode createBMode contextHTMLParser ibsReleaseTestVerificationRegressioNSuite hELLO camelCA camel01CC01 camelCa_1 aabc123 a ab abc abcd abcde camelCasecamelCasecamelCasecamelCasecamelCasecamelCase aG alphabet cP3 a1 a1G a123 camelCase lThan30DaysCount lessThan30DaysCount lessThan30DaysCountA greaterThan30LessThan60DaysCount greaterThan60LessThan90DaysCount greaterThan90DaysCount pascalCase pascal2Case pascalCaseA pascal2CaseA modeA mode2A mode2A2 mode2A2A madeEasy wonderFul andMe htmlParser h aaA camel01C camel01c01 camel01C01 camel0a1c1 camel0a1C1 camel0ac1b1C1 camelC camelC1 camelCa1 ibsReleaseTestVerificationRegressionSuite ibsReleaseTestVerificationRegressioN xmlHttpRequest newCustomerId innerStopwatch supportsIpv6OnIos youTubeImporter youtubeImporter affine3D
Substitution
snake_case PascalCase 2PascalCase streamIOIO gREATERDtha modeADFAFdsADFads aBabcABCDabcABC modeADFdsADFads streamIO aBCabcABCabcA aBCabcA aabcABC deviceSNS pathASNs dscpCP awsVPC deviceID gREA1 gREAt gREAtREAt aABC modeADFsADFads modeADFads createAMode createBMode contextHTMLParser ibsReleaseTestVerificationRegressioNSuite hELLO camelCA camel01CC01 camelCa_1 aabc123 a ab abc abcd abcde camelCasecamelCasecamelCasecamelCasecamelCasecamelCase aG alphabet cP3 a1 a1G a123 camelCase lThan30DaysCount lessThan30DaysCount lessThan30DaysCountA greaterThan30LessThan60DaysCount greaterThan60LessThan90DaysCount greaterThan90DaysCount pascalCase pascal2Case pascalCaseA pascal2CaseA modeA mode2A mode2A2 mode2A2A madeEasy wonderFul andMe htmlParser h aaA camel01C camel01c01 camel01C01 camel0a1c1 camel0a1C1 camel0ac1b1C1 camelC camelC1 camelCa1 ibsReleaseTestVerificationRegressionSuite ibsReleaseTestVerificationRegressioN xmlHttpRequest newCustomerId innerStopwatch supportsIpv6OnIos youTubeImporter youtubeImporter affine3D