Use dynamic variables to return randomly generated data

The Faker library enables you to generate sample data in Postman using predefined variables. Use these variables like you would any other variable in Postman. Their values are generated at the time of execution, and their names start with a $ symbol, for example, $guid or $timestamp.

See how to use dynamic variables to create randomized mock data. To try out this collection template, select Mock data generation.

To use dynamic variables in pre-request or post-response scripts, use pm.variables.replaceIn(). For example, to enter a random first name, use pm.variables.replaceIn('{{$randomFirstName}}'). Note that variable names are case-sensitive.

The following is a list of dynamic variables whose values are randomly generated during the request/collection run.

Common

Variable Name	Description	Examples
$guid	A uuid-v4 style guid	"611c2e81-2ccb-42d8-9ddc-2d0bfa65c1b4"
$timestamp	The current UNIX timestamp in seconds	1562757107, 1562757108, 1562757109
$isoTimestamp	The current ISO timestamp at zero UTC	2020-06-09T21:10:36.177Z
$randomUUID	A random 36-character UUID	"6929bb52-3ab2-448a-9796-d6480ecad36b"

Text, numbers, and colors

Variable Name	Description	Examples
$randomAlphaNumeric	A random alpha-numeric character	6, "y", "z"
$randomBoolean	A random boolean value	true, false
$randomInt	A random integer between 0 and 1000	802, 494, 200
$randomColor	A random color	"red", "fuchsia", "grey"
$randomHexColor	A random hex value	"#47594a", "#431e48", "#106f21"
$randomAbbreviation	A random abbreviation	SQL, PCI, JSON

Internet and IP addresses

Variable Name	Description	Examples
$randomIP	A random IPv4 address	241.102.234.100, 216.7.27.38
$randomIPV6	A random IPv6 address	dbe2:7ae6:119b:c161:1560:6dda:3a9b:90a9
$randomMACAddress	A random MAC address	33:d4:68:5f:b4:c7, 1f:6e:db:3d:ed:fa
$randomPassword	A random 15-character alpha-numeric password	t9iXe7COoDKv8k3, QAzNFQtvR9cg2rq
$randomLocale	A random two-letter language code (ISO 639-1)	"ny", "sr", "si"
$randomUserAgent	A random user agent	Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.8; rv:15.6) Gecko/20100101 Firefox/15.6.6
$randomProtocol	A random internet protocol	"http", "https"
$randomSemver	A random semantic version number	7.0.5, 2.5.8, 6.4.9

Names

Variable Name	Description	Examples
$randomFirstName	A random first name	Ethan, Chandler, Megane
$randomLastName	A random last name	Schaden, Schneider, Willms
$randomFullName	A random first and last name	Connie Runolfsdottir, Sylvan Fay, Jonathon Kunze
$randomNamePrefix	A random name prefix	Dr., Ms., Mr.
$randomNameSuffix	A random name suffix	I, MD, DDS

Profession

Variable Name	Description	Examples
$randomJobArea	A random job area	Mobility, Intranet, Configuration
$randomJobDescriptor	A random job descriptor	Forward, Corporate, Senior
$randomJobTitle	A random job title	International Creative Liaison,
$randomJobType	A random job type	Supervisor, Manager, Coordinator

Phone, address, and location

Variable Name	Description	Examples
$randomPhoneNumber	A random ten-digit phone number	700-008-5275, 494-261-3424, 662-302-7817
$randomPhoneNumberExt	A random phone number with extension (12 digits)	27-199-983-3864, 99-841-448-2775
$randomCity	A random city name	Spinkahaven, Korbinburgh, Lefflerport
$randomStreetName	A random street name	Kuhic Island, General Street, Kendrick Springs
$randomStreetAddress	A random street address	5742 Harvey Streets, 47906 Wilmer Orchard
$randomCountry	A random country	Lao People's Democratic Republic, Kazakhstan, Austria
$randomCountryCode	A random two-letter country code (ISO 3166-1 alpha-2)	CV, MD, TD
$randomLatitude	A random latitude coordinate	55.2099, 27.3644, -84.7514
$randomLongitude	A random longitude coordinate	40.6609, 171.7139, -159.9757

Images

Variable Name	Description	Examples
$randomAvatarImage	A random avatar image	https://s3.amazonaws.com/uifaces/faces/twitter/johnsmithagency/128.jpg
$randomImageUrl	A URL of a random image	http://lorempixel.com/640/480
$randomAbstractImage	A URL of a random abstract image	http://lorempixel.com/640/480/abstract
$randomAnimalsImage	A URL of a random animal image	http://lorempixel.com/640/480/animals
$randomBusinessImage	A URL of a random stock business image	http://lorempixel.com/640/480/business
$randomCatsImage	A URL of a random cat image	http://lorempixel.com/640/480/cats
$randomCityImage	A URL of a random city image	http://lorempixel.com/640/480/city
$randomFoodImage	A URL of a random food image	http://lorempixel.com/640/480/food
$randomNightlifeImage	A URL of a random nightlife image	http://lorempixel.com/640/480/nightlife
$randomFashionImage	A URL of a random fashion image	http://lorempixel.com/640/480/fashion
$randomPeopleImage	A URL of a random image of a person	http://lorempixel.com/640/480/people
$randomNatureImage	A URL of a random nature image	http://lorempixel.com/640/480/nature
$randomSportsImage	A URL of a random sports image	http://lorempixel.com/640/480/sports
$randomTransportImage	A URL of a random transportation image	http://lorempixel.com/640/480/transport
$randomImageDataUri	A random image data URI	data:image/svg+xml;charset=UTF-8,%3Csvg%20xmlns%3D%22http%3A%2F...

Finance

Variable Name	Description	Examples
$randomBankAccount	A random 8-digit bank account number	09454073, 65653440, 75728757
$randomBankAccountName	A random bank account name	Home Loan Account, Checking Account, Savings Account. Auto Loan Account
$randomCreditCardMask	A random masked credit card number	3622, 5815, 6257
$randomBankAccountBic	A random BIC (Bank Identifier Code)	EZIAUGJ1, KXCUTVJ1, DIVIPLL1
$randomBankAccountIban	A random 15-31 character IBAN (International Bank Account Number)	MU20ZPUN3039684000618086155TKZ
$randomTransactionType	A random transaction type	invoice, payment, deposit
$randomCurrencyCode	A random 3-letter currency code (ISO-4217)	CDF, ZMK, GNF
$randomCurrencyName	A random currency name	CFP Franc, Cordoba Oro, Pound Sterling
$randomCurrencySymbol	A random currency symbol	$, £
$randomBitcoin	A random bitcoin address	3VB8JGT7Y4Z63U68KGGKDXMLLH5

Business

Variable Name	Description	Examples
$randomCompanyName	A random company name	Johns - Kassulke, Grady LLC
$randomCompanySuffix	A random company suffix	Inc, LLC, Group
$randomBs	A random phrase of business-speak	killer leverage schemas,
$randomBsAdjective	A random business-speak adjective	viral, 24/7, 24/365
$randomBsBuzz	A random business-speak buzzword	repurpose, harness, transition
$randomBsNoun	A random business-speak noun	e-services, markets, interfaces

Catchphrases

Variable Name	Description	Examples
$randomCatchPhrase	A random catchphrase	Future-proofed heuristic open architecture,
$randomCatchPhraseAdjective	A random catchphrase adjective	Self-enabling, Business-focused, Down-sized
$randomCatchPhraseDescriptor	A random catchphrase descriptor	bandwidth-monitored, needs-based, homogeneous
$randomCatchPhraseNoun	Randomly generates a catchphrase noun	secured line, superstructure,installation

Databases

Variable Name	Description	Examples
$randomDatabaseColumn	A random database column name	updatedAt, token, group
$randomDatabaseType	A random database type	tinyint, text
$randomDatabaseCollation	A random database collation	cp1250_bin, utf8_general_ci, cp1250_general_ci
$randomDatabaseEngine	A random database engine	MyISAM, InnoDB, Memory

Dates

Variable Name	Description	Examples
$randomDateFuture	A random future datetime	Tue Mar 17 2025 13:11:50 GMT+0530 (India Standard Time),
$randomDatePast	A random past datetime	Sat Mar 02 2019 09:09:26 GMT+0530 (India Standard Time),
$randomDateRecent	A random recent datetime	Tue Jul 09 2023 23:12:37 GMT+0530 (India Standard Time),
$randomWeekday	A random weekday	Thursday, Friday, Monday
$randomMonth	A random month	February, May, January

Domains, emails, and usernames

Variable Name	Description	Examples
$randomDomainName	A random domain name	gracie.biz, armando.biz, trevor.info
$randomDomainSuffix	A random domain suffix	org, net, com
$randomDomainWord	A random unqualified domain name	gwen, jaden, donnell
$randomEmail	A random email address	Pablo62@gmail.com, Ruthe42@hotmail.com, Iva.Kovacek61@hotmail.com
$randomExampleEmail	A random email address from an "example" domain	Talon28@example.com, Quinten_Kerluke45@example.net, Casey81@example.net
$randomUserName	A random username	Jarrell.Gutkowski, Lottie.Smitham24, Alia99
$randomUrl	A random URL	https://anais.net, https://tristin.net, http://jakob.name

Files and directories

Variable Name	Description	Examples
$randomFileName	A random file name (includes uncommon extensions)	neural_sri_lanka_rupee_gloves.gdoc,
$randomFileType	A random file type (includes uncommon file types)	model, application, video
$randomFileExt	A random file extension (includes uncommon extensions)	war, book, fsc
$randomCommonFileName	A random file name	well_modulated.mpg4,
$randomCommonFileType	A random, common file type	application, audio
$randomCommonFileExt	A random, common file extension	m2v, wav, png
$randomFilePath	A random file path	/home/programming_chicken.cpio,
$randomDirectoryPath	A random directory path	/usr/bin, /root, /usr/local/bin
$randomMimeType	A random MIME type	audio/vnd.vmx.cvsd,

Stores

Variable Name	Description	Examples
$randomPrice	A random price between 0.00 and 1000.00	531.55, 488.76, 511.56
$randomProduct	A random product	Towels, Pizza, Pants
$randomProductAdjective	A random product adjective	Unbranded, Incredible, Tasty
$randomProductMaterial	A random product material	Steel, Plastic, Frozen
$randomProductName	A random product name	Handmade Concrete Tuna, Refined Rubber Hat
$randomDepartment	A random commerce category	Tools, Movies, Electronics

Grammar

Variable Name	Description	Examples
$randomNoun	A random noun	matrix, bus, bandwidth
$randomVerb	A random verb	parse, quantify, navigate
$randomIngverb	A random verb ending in -ing	synthesizing, navigating, backing up
$randomAdjective	A random adjective	auxiliary, multi-byte, back-end
$randomWord	A random word	withdrawal, infrastructures, IB
$randomWords	Some random words	Samoa Synergistic sticky copying Grocery,
		Corporate Springs,
		Christmas Island Ghana Quality
$randomPhrase	A random phrase	You can't program the monitor without navigating the mobile XML program!,

Lorem ipsum

Variable Name	Description	Examples
$randomLoremWord	A random word of lorem ipsum text	est
$randomLoremWords	Some random words of lorem ipsum text	vel repellat nobis
$randomLoremSentence	A random sentence of lorem ipsum text	Molestias consequuntur nisi non quod.
$randomLoremSentences	A random 2 to 6 sentences of lorem ipsum text	Et sint voluptas similique iure amet perspiciatis vero sequi atque. Ut porro sit et hic. Neque aspernatur vitae fugiat ut dolore et veritatis. Ab iusto ex delectus animi. Voluptates nisi iusto. Impedit quod quae voluptate qui.
$randomLoremParagraph	A random paragraph of lorem ipsum text	Ab aliquid odio iste quo voluptas voluptatem dignissimos velit. Recusandae facilis qui commodi ea magnam enim nostrum quia quis. Nihil est suscipit assumenda ut voluptatem sed. Esse ab voluptas odit qui molestiae. Rem est nesciunt est quis ipsam expedita consequuntur.
$randomLoremParagraphs	3 random paragraphs of lorem ipsum text	Voluptatem rem magnam aliquam ab id aut quaerat. Placeat provident possimus voluptatibus dicta velit non aut quasi. Mollitia et aliquam expedita sunt dolores nam consequuntur. Nam dolorum delectus ipsam repudiandae et ipsam ut voluptatum totam. Nobis labore labore recusandae ipsam quo. Voluptatem occaecati omnis debitis eum libero. Veniam et cum unde. Nisi facere repudiandae error aperiam expedita optio quae consequatur qui. Vel ut sit aliquid omnis. Est placeat ducimus. Libero voluptatem eius occaecati ad sint voluptatibus laborum provident iure. Autem est sequi ut tenetur omnis enim. Fuga nisi dolor expedita. Ea dolore ut et a nostrum quae ut reprehenderit iste. Numquam optio magnam omnis architecto non. Est cumque laboriosam quibusdam eos voluptatibus velit omnis. Voluptatem officiis nulla omnis ratione excepturi.
$randomLoremText	A random amount of lorem ipsum text	Quisquam asperiores exercitationem ut ipsum. Aut eius nesciunt. Et reiciendis aut alias eaque. Nihil amet laboriosam pariatur eligendi. Sunt ullam ut sint natus ducimus. Voluptas harum aspernatur soluta rem nam.
$randomLoremSlug	A random lorem ipsum URL slug	eos-aperiam-accusamus, beatae-id-molestiae, qui-est-repellat
$randomLoremLines	1 to 5 random lines of lorem ipsum	Ducimus in ut mollitia. A itaque non. Harum temporibus nihil voluptas. Iste in sed et nesciunt in quaerat sed.