JSON Merger
Merge two or more JSON documents with shallow/deep strategies.
Works Offline
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No API
Document 1
Document 2
Merged result
Conflicts (1)
- name: "Ada" → "Grace"
About the JSON Merger
Combine multiple JSON documents using shallow or deep merge strategies, with configurable array handling (concat, replace, or union), and a report of every key conflict encountered.
Examples
Deep merge two objects
{"a":{"x":1}}
{"a":{"y":2}}Output
{"a":{"x":1,"y":2}}Keyboard shortcuts
- Copy the main outputCtrl / ⌘ + Shift + C
- Download the resultCtrl / ⌘ + S
- Share this toolCtrl / ⌘ + Shift + S
- Reset the inputsAlt + R
- Open the tool search paletteCtrl / ⌘ + K
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Frequently asked questions
Version 1.0.0 · Updated 2026-08-10 · Runs entirely in your browser