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Dataset JSON Flattener

Try for free

Flatten nested JSON objects into flat key/value rows using configurable dot notation, from inline JSON or an Apify Dataset.

Pricing

Pay per usage

Rating

0.0

(0)

Developer

Starshape Tools

Actor stats

Bookmarked

Total users

Monthly active users

2 days ago

Last modified

What it does

Reads rows from inline JSON or an optional Apify Dataset
Recursively flattens nested plain objects
Uses . as the default separator, with a configurable alternative
Leaves primitives, arrays, and null unchanged
Keeps empty nested objects as empty objects
Writes every flattened row to the default Dataset

Example

Input row:

{
  "id": "A001",
  "user": {
    "name": "Alice",
    "address": {
      "city": "Tokyo"
    }
  }
}

Output row:

{
  "id": "A001",
  "user.name": "Alice",
  "user.address.city": "Tokyo"
}

Input sources

Run with the default input to flatten the two included inline rows without authentication. To process an existing Dataset instead, select it in Source Dataset; that picker requests READ permission only.

When a source Dataset is selected, it takes precedence over inline rows.

Custom separator

Set Key separator to another non-empty string, such as _, to produce keys like user_address_city.

Notes

Arrays are retained as arrays and are not flattened.
Key collisions are resolved in traversal order. For example, an existing user.name key may be overwritten by a nested user.name path.
The Actor uses Apify storage only and does not call external APIs.

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