JSON set field on rows

Client

Stamp a flag or default onto each row in tabular JSON.

Learn more: setting fields

Non-objects in the array become single-key objects; value parses as JSON when possible.

Local processing

Parsing and output formatting run entirely in your browser—nothing is uploaded for this transform.

Input

?
Paste JSON, then read transformed output below.

Nearby workflows on Toolcore

  • JSON pluck field — From a JSON array of objects, output an array of one field's values—browser-only. once JSON text parses on this page.
  • JSON replace values — Replace every value equal to from with to—use from|to, JSON or plain text. once JSON text parses on this page.
  • JSON apply defaults — Fill missing keys from a defaults object—no overwrites; shallow or deep; local only. once JSON text parses on this page.
  • JSON formatter — JSON format online: pretty-print, minify, validate, escape, download . once JSON text parses on this page.

Common use cases

  • Stamp a flag or default onto each row in tabular JSON.

Common mistakes to avoid

  • Invalid JSON

    Fix parse errors before expecting output.

FAQ

Is data uploaded?

No—all parsing and transforms run locally.

How is this different from jq?

This page focuses on one deterministic task without a filter language.

More tools

Related utilities you can open in another tab—mostly client-side.