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Enrich Fields (Free Online Tool)

Add or default fields on objects using expressions, generated values, and fallbacks

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Try examples:

→ Enrich this data with additional derived fields and add ID and timestamp to eac...

[
{
"event": "worker_run_start",
"component": "pipeline"
},
{
"event": "debug_config_synced",
"component": "pipeline"
}
]
Output✓
1[
2  {
3    "event": "worker_run_start",
4    "component": "pipeline",
5    "id": "550e8400-e29b-41d4-a716-446655440000",
6    "ts": "2026-03-03T07:20:35.200Z"
7  },
8  {
9    "event": "debug_config_synced",
10    "component": "pipeline",
11    "id": "6ba7b810-9dad-11d1-80b4-00c04fd430c8",
12    "ts": "2026-03-03T07:20:35.200Z"
13  }
14]

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No setup needed. Works with curl, Node, Python.

Uses example data. For edited input, copy from the playground.

Read integration guide

Works with:

  • API responses
  • Nested JSON
  • Arrays & objects

Example: input → output

Input / Output
Input
[
  {
    "event": "worker_run_start",
    "component": "pipeline"
  },
  {
    "event": "debug_config_synced",
    "component": "pipeline"
  }
]
Output
[
  {
    "event": "worker_run_start",
    "component": "pipeline",
    "id": "550e8400-e29b-41d4-a716-446655440000",
    "ts": "2026-03-03T07:20:35.200Z"
  },
  {
    "event": "debug_config_synced",
    "component": "pipeline",
    "id": "6ba7b810-9dad-11d1-80b4-00c04fd430c8",
    "ts": "2026-03-03T07:20:35.200Z"
  }
]

Related tools

Advanced usage (optional)

Enrich Fields

v1.0.0
Structure
objectarray

Description

Enrich Fields

Add or default fields on objects using expressions like uuid(), now(), and field fallbacks.

Use Cases

  • Add unique IDs to each item in an array
  • Add timestamps to track when data was processed
  • Provide default values for missing fields
  • Derive new fields from existing data

Configuration

Mode

  • each - Apply fields to each item in an array
  • root - Apply fields to the root object directly

Fields to Add

Map field names to expressions. Supported expressions:

ExpressionDescriptionExample
uuid()Generate a unique UUID"550e8400-e29b-41d4-a716-446655440000"
now()Current ISO timestamp"2026-03-03T07:20:35.200Z"
fieldNameReference another fieldUses the value of fieldName
`field \\"default"`Fallback if field is missingReturns "default" if field is undefined
"literal"A literal string value"browser"
123A literal number123

Examples

Add ID and timestamp to each item

Input:

[
  { "event": "worker_run_start", "component": "pipeline" },
  { "event": "debug_config_synced", "component": "pipeline" }
]

Config:

  • Mode: each
  • Fields: id → uuid(), ts → now()

Output:

[
  { "event": "worker_run_start", "component": "pipeline", "id": "550e8400-e29b-41d4-a716-446655440000", "ts": "2026-03-03T07:20:35.200Z" },
  { "event": "debug_config_synced", "component": "pipeline", "id": "6ba7b810-9dad-11d1-80b4-00c04fd430c8", "ts": "2026-03-03T07:20:35.200Z" }
]

Add domain with fallback

Input:

[
  { "event": "worker_run_start", "component": "pipeline" },
  { "event": "page_load" }
]

Config:

  • Mode: each
  • Fields: domain → component || "browser"

Output:

[
  { "event": "worker_run_start", "component": "pipeline", "domain": "pipeline" },
  { "event": "page_load", "domain": "browser" }
]

Configuration

NameTypeDefaultDescription
ModeenumeachApply to each item in an array, or to the root object directly each root
Fields to Addcolumn-mapping(required)Map field names to expressions. Supported: uuid(), now(), fieldName, field || "default", "literal", 123

Examples

AI Prompt
Enrich this data with additional derived fields and add ID and timestamp to each item.
[
{
"event": "worker_run_start",
"component": "pipeline"
},
{
"event": "debug_config_synced",
"component": "pipeline"
}
]
Output✓
1[
2  {
3    "event": "worker_run_start",
4    "component": "pipeline",
5    "id": "550e8400-e29b-41d4-a716-446655440000",
6    "ts": "2026-03-03T07:20:35.200Z"
7  },
8  {
9    "event": "debug_config_synced",
10    "component": "pipeline",
11    "id": "6ba7b810-9dad-11d1-80b4-00c04fd430c8",
12    "ts": "2026-03-03T07:20:35.200Z"
13  }
14]
Config
Mode
each
Fields to Add
1[
2  {
3    "columnName": "id",
4    "expression": "uuid()"
5  },
6  {
7    "columnName": "ts",
8    "expression": "now()"
9  }
10]

API Usage

POST /api/v1/utilities/structure.enrich-fields
Example:
curl -X POST https://your-domain.com/api/v1/utilities/structure.enrich-fields \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"inputs":{"primary":[{"event":"worker_run_start","component":"pipeline"},{"event":"debug_config_synced","component":"pipeline"}]},"config":{"mode":"each","fields":[{"columnName":"id","expression":"uuid()"},{"columnName":"ts","expression":"now()"}]}}'
Response
1[
2  {
3    "event": "worker_run_start",
4    "component": "pipeline",
5    "id": "550e8400-e29b-41d4-a716-446655440000",
6    "ts": "2026-03-03T07:20:35.200Z"
7  },
8  {
9    "event": "debug_config_synced",
10    "component": "pipeline",
11    "id": "6ba7b810-9dad-11d1-80b4-00c04fd430c8",
12    "ts": "2026-03-03T07:20:35.200Z"
13  }
14]