JSON shallow merge rows

Client

Combine partial config fragments—rightmost duplicate keys win.

Learn more: shallow merge

Root must be an array of objects; merge is one level only.

Local processing

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

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Nearby workflows on Toolcore

  • JSON deep merge — Merge two objects recursively—right overlays left; dual JSON prefill. once JSON text parses on this page.
  • JSON merge arrays by key — Join rows from left and right arrays on a shared field—spread merge, browser-only. 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

  • Combine partial config fragments—rightmost duplicate keys win.
  • Paste valid JSON, then read the transformed output below.

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.