- isIn
- isInt
- isJSON
- isJWT
- isLatLong
- isLength
- isLocale
- isMACAddress
- isMagnetURI
- isMD5
- isMimeType
- isMobilePhone
- isMongoId
- isMultibyte
- isNumeric
- isOctal
- isEmail
- isHexColor
- isHexadecimal
- isHsl
- isIBAN
- isIdentityCard
- isIMEI
- isIP
- isIPRange
- isISBN
- isISIN
- isISO31661Alpha2
- isISO31661Alpha3
- isISO8601
- isISRC
- isISSN
- isCurrency
- isDataURI
- isDate
- isDecimal
- isDivisibleBy
- isEAN
- isEmpty
- isEthereumAddress
- isFloat
- isFQDN
- isFullWidth
- isHalfWidth
- isHash
- isLowercase
- isAfter
- isAlpha
- isAlphanumeric
- isAscii
- isBase32
- isBase64
- isBefore
- isBIC
- isBoolean
- isBtcAddress
- isByteLength
- isCreditCard