New in Kissflow Apps: New variable types with updated limits

What's new?

We are thrilled to introduce three new variable types for JSON variables across apps:

• Object
• Array of objects
• Array of strings

What has changed?

In addition, we have implemented new limits for JSON variable data and schema in to ensure system stability and better performance. Now, the following limits apply to new and existing JSON variables in Kissflow Apps across all environments.

Limits for variable type: Object

• Root object keys: 100 maximum (top level)

• Nesting depth: 2 levels

• Nested object keys in level 1: 20 maximum

• Nested object keys in level 2: 10 maximum

• Array items: 10 per array

• Array item object keys: 10 per array

Example JSON for object

{
  "orderId": "po1001",
  "productName": "Laptop",
  "category": "Electronics",
  "quantity": 5,
  "status": "active",
  "createdAt": "2026-01-15T10:30:00Z",
  "customer": {
    "customerId": "cust001",
    "name": "Alice Johnson",
    "email": "alice@example.com",
    "phone": "555-1234",
    "address": {
      "street": "123 Main St",
      "city": "New York",
      "zip": "10001"
    }
  },
  "payment": {
    "method": "credit_card",
    "amount": 4999.95,
    "currency": "USD",
    "status": "paid"
  },
  "tags": ["priority", "fragile", "express"]
}

Limits for variable type: Array of objects

• Root array items: 100 maximum

• Nesting depth: 3 levels

• Nested object keys in level 1: 30 maximum

• Nested object keys in level 2: 20 maximum

• Nested object keys in level 3: 10 maximum

• Array items: 10 per array

• Array item object keys: 10 per array

Example JSON for array of objects

[
{
"orderId": "po1001",
"customer": {
"customerId": "cust001",
"name": "Alice Johnson",
"email": "alice@example.com",
"phone": "555-1234",
"address": {
"street": "123 Main St",
"city": "New York",
"state": "NY",
"zip": "10001",
"country": "US"
}
},
"items": [
{
"itemId": "item001",
"productName": "Laptop",
"quantity": 2,
"unitPrice": 999.99,
"discount": 50.00
},
{
"itemId": "item002",
"productName": "Mouse",
"quantity": 3,
"unitPrice": 29.99,
"discount": 0
}
],
"status": "shipped",
"createdAt": "2026-01-15T10:30:00Z",
"updatedAt": "2026-01-16T08:00:00Z",
"totalAmount": 2039.95,
"currency": "USD",
"paymentMethod": "credit_card",
"notes": "Handle with care",
"tags": ["priority", "fragile"]
},
{
"orderId": "po1002",
"customer": {
"customerId": "cust002",
"name": "Bob Smith",
"email": "bob@example.com",
"phone": "555-5678",
"address": {
"street": "456 Oak Ave",
"city": "Los Angeles",
"state": "CA",
"zip": "90001",
"country": "US"
}
},
"items": [
{
"itemId": "item003",
"productName": "Monitor",
"quantity": 1,
"unitPrice": 349.99,
"discount": 20.00
},
{
"itemId": "item004",
"productName": "Keyboard",
"quantity": 1,
"unitPrice": 79.99,
"discount": 0
}
],
"status": "pending",
"createdAt": "2026-02-10T14:00:00Z",
"updatedAt": "2026-02-10T14:00:00Z",
"totalAmount": 409.98,
"currency": "USD",
"paymentMethod": "paypal",
"notes": "",
"tags": ["standard"]
}
]

 Limits for variable type: Array of strings

• Root array items: 30 maximum

Example JSON for array of strings

["electronics", "clothing", "furniture", "sports", "books"]

What this means for you

As previously notified here, the new variable limits will affect your existing JSON variable data.

We recommend auditing and editing your JSON variable data to comply with these limits to avoid disruption in your apps.

Read more about the variable types and the schema here. Please feel free to contact our support team in case of any queries.