Umami · Schema

Session

Visitor session record

Cookieless TrackingOpen-SourcePrivacyWeb AnalyticsWebsite AnalyticsProduct AnalyticsEvent TrackingSelf-HostedGDPRSession ReplayHeatmapsMarketing Attribution

Properties

Name	Type	Description
id	string	Session identifier
websiteId	string	Website identifier
browser	string	Browser name
os	string	Operating system
device	string	Device type
screen	string	Screen resolution
language	string	Browser language
country	string	Country code
createdAt	string	Session start timestamp

View JSON Schema on GitHub

JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12",
  "$id": "https://raw.githubusercontent.com/api-evangelist/umami/refs/heads/main/json-schema/umami-session-schema.json",
  "title": "Session",
  "description": "Visitor session record",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Session identifier",
      "format": "uuid",
      "examples": [
        "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
      ]
    },
    "websiteId": {
      "type": "string",
      "description": "Website identifier",
      "format": "uuid",
      "examples": [
        "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
      ]
    },
    "browser": {
      "type": "string",
      "description": "Browser name",
      "examples": [
        "Chrome"
      ]
    },
    "os": {
      "type": "string",
      "description": "Operating system",
      "examples": [
        "Windows"
      ]
    },
    "device": {
      "type": "string",
      "description": "Device type",
      "examples": [
        "desktop"
      ]
    },
    "screen": {
      "type": "string",
      "description": "Screen resolution",
      "examples": [
        "1920x1080"
      ]
    },
    "language": {
      "type": "string",
      "description": "Browser language",
      "examples": [
        "en-US"
      ]
    },
    "country": {
      "type": "string",
      "description": "Country code",
      "examples": [
        "US"
      ]
    },
    "createdAt": {
      "type": "string",
      "description": "Session start timestamp",
      "format": "date-time",
      "examples": [
        "2026-01-15T10:00:00.000Z"
      ]
    }
  }
}

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