JSON merge two objects
ClientCombine defaults with overrides in one deterministic object.
Learn more: merging objects
One level only—nested objects are not deep-merged.
Local processing
Parsing and output formatting run entirely in your browser—nothing is uploaded for this transform.
Loading…
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 shallow merge rows — Merge an array of objects into one shallow object—later keys overwrite, local. 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 defaults with overrides in one deterministic object.
- 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.
JSON deep merge
ClientMerge two objects recursively—right overlays left; dual JSON prefill.
JSON shallow merge rows
ClientMerge an array of objects into one shallow object—later keys overwrite, local.
JSON apply defaults
ClientFill missing keys from a defaults object—no overwrites; shallow or deep; local only.
JSON formatter
ClientJSON format online: pretty-print, minify, validate, escape, download .json.