Faker.js helpers

Mockoon implements Faker.js v8.1.0 library by wrapping most of the available helpers. Faker.js offers lots of helpers: location.zipCode, location.city, location.count, person.firstName, person.lastName, number.int, number.float, internet.avatar, internet.email, etc. Please have a look at Faker.js documentation to learn how to use them.


All Faker.js helpers must be used with the following syntax: {{faker 'namespace.method'}}. Examples:

{{faker 'location.zipCode'}} {{faker 'location.city'}} {{faker 'location.county'}} {{faker 'person.firstName'}} ...

Faker.js methods may use two different ways of passing parameters: ordered arguments or option object (with eventually a depth > 1). Wrapped in a Handlebars helper, this may result in different syntaxes:

  • Ordered arguments: {{faker 'namespace.method' arg1 arg2 arg3}}
{{faker 'number.int' 100}} <!-- 100 is the max --> {{faker 'string.alphanumeric' 25}}
  • Option object with named parameters: {{faker 'namespace.method' arg1='value1' arg2='value2'}} will be translated to an option object { arg1: 'value1', arg2: 'value2' }
{{faker 'number.int' min=10 max=100}} {{faker 'string.alphanumeric' casing='mixed' length=50}}
  • Option object with named parameters and depth > 1: {{faker 'namespace.method' '{arg1: "value1", arg2: { prop1: "value2"}}'}} will be translated to a complex option object { arg1: 'value1', arg2: { prop1: 'value2' } }. Be sure to escape the single or double quotes inside your option string accordingly.
{{faker 'number.int' '{min: 10, max: 100}'}} {{faker 'string.alphanumeric' '{casing: "lower", length: { min: 1, max: 3}}'}}

 Set Faker.js' locale and seed

Faker.js locale and seed can be defined in the application settings:

fakerjs settings

The locale and seed can also be set when running your mock using the CLI's flags or the serverless package options.