Generating Fake Data

Faker provides template functions for generating realistic fake data using FakerJS. Use it to create dynamic test data like names, emails, addresses, and more.

Installing the Faker Plugin

Faker is available as a plugin. To install it:

1. Go to yaak.app/plugins/@yaak/faker and click Install, or
2. Open Settings > Plugins in Yaak and search for “Faker”

Using Faker Functions

Once installed, Faker functions are available anywhere Yaak supports template syntax. Type faker. or use Control+Space to trigger autocomplete and browse available functions.

The syntax follows the pattern:

${[ faker.<category>.<method>() ]}

For example:

• ${[ faker.person.fullName() ]} generates a random full name
• ${[ faker.internet.email() ]} generates a random email address
• ${[ faker.string.uuid() ]} generates a random UUID

Passing Arguments

Many Faker functions accept arguments to customize the output. Click on any Faker template tag to open the configuration dialog, where you can pass arguments as JSON.

Arguments can be passed in three formats:

Object - Most Faker functions accept an options object:

{"protocol": "http"}

Array - For functions with multiple positional arguments:

["en", "US"]

Scalar - For simple single-value arguments:

10

The dialog includes a link to the FakerJS documentation for each function and shows a live preview of the generated value.

Example: JSON Request Body

Here’s an example JSON body using Faker to generate test data:

{
  "id": "${[ faker.string.uuid() ]}",
  "name": "${[ faker.person.fullName() ]}",
  "email": "${[ faker.internet.email() ]}",
  "phone": "${[ faker.phone.number() ]}",
  "address": {
    "street": "${[ faker.location.streetAddress() ]}",
    "city": "${[ faker.location.city() ]}",
    "country": "${[ faker.location.country() ]}",
    "zipCode": "${[ faker.location.zipCode() ]}"
  },
  "company": "${[ faker.company.name() ]}",
  "website": "${[ faker.internet.url() ]}"
}

Each request generates fresh random data:

{
  "id": "589f0aec-7310-4bf2-81c4-0b1bb7f1c3c1",
  "name": "Lucy Gottlieb-Weissnat",
  "email": "Destiny_Herzog@gmail.com",
  "phone": "411.805.2871 x699",
  "address": {
    "street": "846 Christ Mills",
    "city": "Spencerfurt",
    "country": "United Kingdom",
    "zipCode": "20354"
  },
  "company": "Emard, Kohler and Rutherford",
  "website": "https://watery-detective.org"
}

Available Categories

The plugin provides access to all FakerJS modules:

Category	Description	Example Methods
airline	Airline-related data	aircraftType, airline, airplane
animal	Animal names and types	bear, bird, cat, dog, fish
color	Colors in various formats	human, rgb, hex, hsl
commerce	E-commerce data	department, product, price
company	Company information	name, catchPhrase, bs
database	Database-related data	column, type, collation
date	Date and time values	recent, future, past, between
finance	Financial data	account, amount, currency
git	Git-related data	branch, commitEntry, commitSha
hacker	Tech/hacker terminology	abbreviation, noun, phrase
image	Image URLs and data	avatar, url, dataUri
internet	Internet-related data	email, url, ip, userAgent
location	Geographic data	city, country, latitude, longitude
lorem	Lorem ipsum text	word, sentence, paragraph
music	Music-related data	genre, songName, artist
number	Numeric data	int, float, binary, hex
person	Personal information	firstName, lastName, fullName
phone	Phone numbers	number, imei
science	Scientific data	chemicalElement, unit
string	String utilities	uuid, alpha, alphanumeric
system	System-related data	fileName, mimeType, fileExt
vehicle	Vehicle information	vehicle, manufacturer, model
word	Word generation	adjective, adverb, conjunction

For the complete list of methods and options, see the FakerJS documentation.