Property Reference

Property Types

Properties are attributes that help you define the specifics of an Event, a User, or a Group. Mixpanel has many Properties defined in its Data Model.

Property Type	Description
Event Properties	Event Properties describes the events that are tracked within your product.
Super Properties	Super Properties are a logical term for global Event Properties that, after registration, are saved into the end user's device, and appended to every event from that device until persistence is cleared. This logical term is mostly applicable to our client-side libraries.
User Profile Properties	User Profile Properties describe your users (they typically store current demographical information). User profiles are joined to events based on Distinct ID.
Group Profile Properties	Group Profile Properties describe group level information (similar to User Profiles Properties at user level). With Mixpanel’s Group Analytics, multiple users can be grouped and behavioural data analysed at a customised group level (such as company, account). Group profiles are joined to events on your chosen Group Key.
Lookup Tables	Lookup Tables allow you to dynamically extend additional properties mapped to an existing Event or User Property. For example, if you create a lookup table for "Songs" (that contains additional properties like `hash_tags`, `top_10`, `all_time_favorite`) and map it to an event property `song_id`; you can use these additional properties when doing filtering or breakdowns for events that has `song_id` as an event property.
Default Properties	Default Properties (for Events and User Profiles) are collected and populated with values automatically in Mixpanel. This can happen upon data ingestion or when using certain Mixpanel client-side SDKs. Typically, they have a dollar sign ($) or “mp_” as prefix to distinguish them from normal properties.
Reserved Properties	Mixpanel reserves certain property names (for Events and User Profiles) for special use cases, and these may or may not be automatically populated with values. The purpose of such Reserved Properties are for processing (ie event time stamping) or for specific system features (eg: cohort exports). Examples: `time`, `$email`, `$phone`, `$name`, `$created`.

Default Properties

Mixpanel's Data Ingestion APIs (opens in a new tab) and Client-Side SDKs automatically collect certain properties on every event or user profile. Do also note that some Customer Data Platforms (CDPs) that integrate with Mixpanel may also map their own properties to Mixpanel default properties. This document describes what those properties mean.

Ingestion APIs

To disable capturing of geolocation properties (i.e. City, Region, Country) refer to the respective SDKs or API documentation. For a quick reference, refer to examples on disabling geolocation on client-side SDKs and server-side best practice on tracking geolocation.

Event Properties

Raw Name	Display Name	Description
$city	City	The city of the event sender parsed from the IP property or the Latitude and Longitude properties.
$region	Region	The region (state or province) of the event sender parsed from the IP property or the Latitude and Longitude properties.
mp_country_code	Country	The country of the event sender parsed from the IP property or the Latitude and Longitude properties. The value is stored as a 2-letter country code in the raw data and parsed into the country name in the UI.
$mp_api_endpoint	API Endpoint	Mixpanel property to record the API endpoint the data was sent to: api.mixpanel.com - default ingestion api-eu.mixpanel.com - EU data ingestion api-js.mixpanel.com - Javascript SDK
$import	Import	Internal Mixpanel property set to `true` to indicate that events were sent through /import API (opens in a new tab).
$mp_api_timestamp_ms	API Timestamp	UTC timestamp in milliseconds when the event was received by our API.
mp_processing_time_ms	Time Processed (UTC)	UTC timestamp in milliseconds when the event was processed by Mixpanel servers.

User Properties

Do note that Mixpanel's default user properties are only updated when you send or update at least one property yourself (via $set (opens in a new tab) or $set_once (opens in a new tab) operations). Please, refer to this article to understand how to send or update profile properties.

Raw Name	Display Name	Description
$city	City	The city of the user parsed from the IP property or the Latitude and Longitude properties.
$region	Region	The region (state or province) of the user parsed from the IP property or the Latitude and Longitude properties.
$country_code	Country Code	The country of the user parsed from the IP property or the Latitude and Longitude properties. The value is stored as a 2-letter country code in the raw data and parsed into the country name in the UI.
$geo_source	Geo Source	Set to "reverse_geocoding" if profile geolocation properties (Country Code, Region, and City) were determined through Latitude and Longitude.
$timezone	Timezone	Timezone of the user parsed from the IP property or the Latitude and Longitude properties.
$last_seen	Updated at	The last time a user profile property was set or updated (this should not be set manually). Passing `$ignore_time` as `true`, typically for server-side updates, will skip updating the $last_seen property. See example here.

Client-side SDKs

Note that the following SDKs wrap around our other SDKs; and as such, would also inherit the appropriate default properties from these wrapped SDKs indicated in the tables below:

React Native wraps around Android and Swift SDK; mp_lib will be set to react-native with $lib_version set as React Native's library version.
Flutter wraps around Javscript, Android, and Swift SDK; mp_lib will be set to flutter with $lib_version set as the Flutter's library version.

Event Properties

Raw Name	Display Name	Description Scroll right to see more columns -->	Javascript	Android	iOS Objective-C / Swift	Unity
$device_id	Device ID	Autogenerated ID that is local to the device. Calling reset() regenerates this value. More details here.	✅	✅	✅	❌
$user_id	User ID	The identified ID of the user. Calling identify() sets this. More details here.	✅	✅	✅	❌
$insert_id	Insert ID	A unique identifier for the event, used to deduplicate events that are accidentally sent multiple times. More details here (opens in a new tab).	✅	✅	✅	✅
mp_lib	Mixpanel Library	The Mixpanel library that sent the event.	`web`	`android`	`iphone` / `swift`	`unity`
$lib_version	Library Version	Mixpanel library version.	✅	✅	✅	✅
mp_sent_by_lib_version	Sent By Library Version	Mixpanel library version used to send data (not necessarily the same as the version which enqueued the data).	✅	❌	❌	❌
$os	Operating System	OS of the event sender.	✅	✅	✅	✅
$os_version	OS Version	The current version of operating system on the device.	❌	✅	✅	✅
$browser	Browser	Name of the browser.	✅	❌	❌	❌
$browser_version	Browser Version	Version of the browser.	✅	❌	❌	❌
$app_build_number	App Build Number	General build of the app.	❌	✅	✅	❌
$app_version_string	App Version	Current app version.	❌	✅	✅	✅
$device	Device	Name of the event sender’s device, if they’re on mobile web.	✅	❌	❌	✅
$screen_height	Screen Height	The height of the device screen in pixels / points (iOS).	✅	✅	✅	✅
$screen_width	Screen Width	The width of the device screen in pixels / points (iOS).	✅	✅	✅	✅
$screen_dpi	Screen DPI	Pixel density of the device screen.	❌	✅	❌	✅
$current_url	Current URL	The URL of the page on which the event was tracked.	✅	❌	❌	❌
$initial_referrer	Initial Referrer	Referring URL when the user first arrived on your site. Defaults to "$direct" if the user is not referred.	✅	❌	❌	❌
$initial_referring_domain	Initial Referring Domain	Referring domain at first arrival. Defaults to "$direct" if the user is not referred.	✅	❌	❌	❌
$referrer	Referrer	Referring URL including your own domain. Might not be present if document.referrer does not return a value. As opposed to $initial_referrer and $initial_referring_domain, this property will be omitted if the user lands directly or the referring website adds the rel="noreferrer" parameter.	✅	❌	❌	❌
$referring_domain	Referring Domain	Referring domain including your own domain. Might not be present if document.referrer does not return a value. As opposed to $initial_referrer and $initial_referring_domain, this property will be omitted if the user lands directly or the referring website adds the rel="noreferrer" parameter.	✅	❌	❌	❌
$search_engine	Search Engine	The search engine that the customer used when they arrived at your domain.	✅	❌	❌	❌
mp_keyword	Search Keyword	Search keywords detected on the referrer from a search engine to your domain. This property is only collected when search keywords are included in a URL.	✅	❌	❌	❌
utm_source, utm_medium, etc.	UTM Parameters	UTM tags derived from the URL a customer clicked to arrive at your domain. Each UTM will be collected under its own property. More details here.	✅	❌	❌	❌
$manufacturer	Manufacturer	Device manufacturer.	❌	✅	✅	✅
$brand	Brand	Device brand.	❌	✅	❌	❌
$model	Model	The model of the device.	❌	✅	✅	✅
$watch_model	Watch Model	The model of the iOS watch.	❌	❌	✅	❌
$carrier	Carrier	Wireless carrier of the device owner.	❌	✅	✅	❌
$radio	Radio	Current cellular network communication standard (opens in a new tab)(opens in a new tab) (3G, 4G, LTE, etc).	❌	✅	✅	✅
$wifi	Wifi	Set to true if the user’s device has an active, available Wifi connection, false if not.	❌	✅	✅	✅
$bluetooth_enabled	Bluetooth	Set to true if Bluetooth is enabled, false if not.	❌	✅	❌	❌
$bluetooth_version	Bluetooth Version	Set to "none", "ble", or "classic".	❌	✅	❌	❌
$has_nfc	Has NFC	Set to true if Near Field Communication is being used, false if not.	❌	✅	❌	❌
$has_telephone	Has Telephone	Set to true if this device has telephone functionality, false if not.	❌	✅	❌	❌
$google_play_services	Google Play Services	Verifies that Google Play services is installed and enabled on this device, and that the version installed on this device is no older than the one required by this client.	❌	✅	❌	❌
$duration	Duration	A property that is appended to an event to capture the elapsed time (in seconds) between a `time_event` and a `track` call. See time_event (opens in a new tab) in Javascript SDK for example.	✅	✅	✅	✅

User Properties

Raw Name	Display Name	Description Scroll right to see more columns -->	Javascript	Android	iOS Objective-C / Swift	Unity
$lib_version	Library Version	Last used Mixpanel library version (also applies to React Native and Flutter wrapper SDKs).	❌	❌	❌	✅
$android_lib_version	Android Lib Version	Last used Mixpanel Android / Unity library version.	❌	✅	❌	✅
$ios_lib_version	iOS Lib Version	Last used Mixpanel iOS / Unity library version.	❌	❌	✅	✅
$swift_lib_version	Swift Lib Version	Last used Mixpanel Swift library version.	❌	❌	✅	❌
$os	Operating System	Last OS of the event sender.	✅	✅	✅	✅
$android_os	Android OS	Set when Android operating system was used.	❌	✅	❌	✅
$android_os_version	Android OS Version	Last version of Android on the device.	❌	✅	❌	✅
$ios_version	iOS Version	Last version of iOS on the device.	❌	❌	✅	✅
$browser	Browser	Name of the browser.	✅	❌	❌	❌
$browser_version	Browser Version	Version of the browser.	✅	❌	❌	❌
$android_app_version	Android App Version	Current Android app version (versionName (opens in a new tab)).	❌	✅	❌	✅
$android_app_version_code	Android App Version Code	Current Android app version code (versionCode (opens in a new tab)).	❌	✅	❌	❌
$ios_app_release	iOS App Release	The release or version number of the iOS app (CFBundleShortVersionString (opens in a new tab)).	❌	❌	✅	✅
$ios_app_version	iOS App Version	The version of the build that identifies an iteration of the iOS app (CFBundleVersion (opens in a new tab)).	❌	❌	✅	❌
$initial_referrer	Initial Referrer	Referring URL when the user first arrived on your site. Defaults to "$direct" if the user is not referred.	✅	❌	❌	❌
$initial_referring_domain	Initial Referring Domain	Referring domain at first arrival. Defaults to "$direct" if the user is not referred.	✅	❌	❌	❌
initial_utm_source, initial_utm_medium, etc.	Initial UTM Parameters	UTM tags seen for the first time from the URL a customer clicked to arrive at your domain. Each UTM will be collected under its own property. More details here.	✅	❌	❌	❌
$android_manufacturer	Android Manufacturer	Android device manufacturer.	❌	✅	❌	❌
$android_brand	Android Brand	Android device brand.	❌	✅	❌	❌
$android_model	Android Model	The model of the Anroid device.	❌	✅	❌	✅
$ios_device_model	iOS Device Model	The model of the iOS device.	❌	❌	✅	✅

Supported Data Types

Mixpanel supports five data types for properties: String, Numeric, Boolean, Date and List. By choosing the most suitable data type for your properties, you'd be able to apply a set of operators that are most relevant to your properties in Mixpanel reports, and this will give you richer insights about your data.

String

Alphanumeric value e.g. Plan Type = "Free", Artist Name = "Bruno Mars"
String properties have a character limit of 255 bytes.
Mixpanel will treat any property value that doesn’t match any other data type as a String.

Numeric

Numeric (integer or decimal) value e.g. Cost = 15.00, Quantity = 5
You can apply operators such as sum, median and percentile on numeric properties.

Boolean

Mixpanel treats properties as boolean if the value is either the JSON constant true or false e.g. Favorited = true, Bookmarked = false.
On Mixpanel, you can typecast any non-boolean property to boolean,
"false", 0, null, undefined, and empty string will be typecasted to boolean false
"true" and any set value that is not 0 or empty string will be typecasted to boolean true

Date

An ISO formatted date YYYY-MM-DDTHH:MM:SS in UTC e.g. Last Purchase = "2022-10-30T13:30:25", Last Login = "2022-10-29". Note that all timestamps need to be sent in UTC timezone in an ISO format.
Mixpanel treats unix timestamps as Numeric property, however, you can typecast it to Date data type.

List

A list of values as a JSON array e.g Favourite Genres = ["Folk","Alternative"] or Favourite Numbers = [1,5,10.0]
Limits of a List property: Event Property = 8KB, User Profile Property = 256KB
Each item in a list would be futher limited by their data type's limits; example: a list of strings would be limited by 255 bytes per string. Also refer to List of Objects covered below.
Mixpanel lists are not ordered (i.e. position of values in a list are not significant in Mixpanel reports) and are useful for grouping or analysing similar values across events. Read more details on List Property Support in reports.

Object and List of Objects Data Types

Mixpanel also supports object and list of objects data types in a limited capacity. These are typically for very specific use cases such as in e-commerce (eg Cart Items, Search Filters). It is highly encouraged that you use the five primary data types as they are fully supported in the Mixpanel UI.

Object

Arbitrarily-nested groups of JSON key-value pairs e.g. Experiments = {"Exp Onboarding":"Quick","Exp Checkout":"Without Coupon"}
Limits of a Object property: Event Property = 8KB, User Profile Property = 256KB, max 255 keys per nested object with a max nesting depth of 3
Mainly supported in core reports (i.e. Insights, Funnels, Flows, Retention, Users / Cohorts, Events) as filters and breakdowns. Property Names (ie keys) within an object are not supported in Lexicon.

List of Objects

A JSON array of 1 level JSON objects with each object having similar sets of key-value pairs e.g. Cart = [{"Brand":"Puma","Category":"Jacket","Price":30}, {"Brand":"Adidas","Category":"Hats","Price":15}]
Limits of a List of Objects: Event Property = 8KB, User Profile Property = 256KB, max 255 keys and no nesting
By default, only the first 5 objects within the list will be parsed in Mixpanel UI, more details here.
Mainly supported in core reports (i.e. Insights, Funnels, Flows, Retention, Users / Cohorts, Events) as filters and breakdowns. Property Names (ie keys) within an object are not supported in Lexicon.

Lookup Tables Ad Spend

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