Regular Expressions

While Mockaroo supports a ton of built-in datatypes, it doesn't have everything and probably never will. Fortunately, you can use the powerful Regular Expression datatype to generate random data in almost any format.

The following character classes are supported:

`\d`	numbers
`\w`	words from lorem ipsum
`[:alpha:]`	letters
`[:upper:]`	uppercase letters
`[:lower:]`	lowercase letters
`[:name:]`	random first and last name
`[:first_name:]`	random first name
`[:last_name:]`	random last name
`[:plus:]`	+
`[:question:]`	?
`{{ my_field }}`	Value of field named "my field"

Examples

Aa3h15! => "Aaaahhhhh!"

\d4 => "5168"

[:upper:]2-\d3-[:lower:]1 => "XS-455-c"

((A|B|C)2)((1|2|3)3) => "CB211"

[:plus:]\d2 \d3 \d3 \d4 => "+01 410 555 3934"

Mockaroo uses randgen for generating values from regular expressions. See the randgen documentation for more info on syntax.

Use Case: Currencies

Let's say you want to generate random prices between 1 and 100 in different currencies that look like:

10,26 AUD
3,99 EUR
100,00 CNY
...

You can generate data like this by first creating a Currency Code field called "currency", then a Regular Expression field called "price" with the following pattern:

\d{1,3},\d{2} {{currency}}

By combining Mockaroo's built-in datatypes with your own regular expressions, you can mock virtually any type of data!