Merge JSON
Deep-merge two JSON documents into one. Everything runs on your device — nothing is sent to a server.
The result will appear here…
or press Ctrl+Enter
Everything runs in your browser. Your data is never sent to our servers.
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Example
Example Input
{"a":1} + {"b":2}Example Output
{"a":1,"b":2}How to Use
- 1Paste your data into the Input field.
- 2If the tool has "More settings" (mode, query, columns, etc.), set them as needed.
- 3Click the button (or press Ctrl+Enter) to process.
- 4Copy the result with the Copy button.
About Merge JSON
Merge JSON combines two JSON documents recursively: objects merge per-key, arrays concatenate, and values from the second document override the first where shapes differ.
It is useful for combining default configuration with overrides, merging API responses, or uniting several data sources.
Enter the first JSON in the Input and the second JSON in "More settings". Processed in the browser.
FAQ
Is my data sent to a server?
No. Merge JSON runs entirely in your browser using client-side libraries. Your data never leaves your device.