Merge JSON Objects

Merge JSON Objects combines multiple JSON inputs into a single result. The Merge JSON Objects tool supports deep merging, live preview, file import, and one-click export.

Paste multiple JSON objects separated by newlines.
No file chosen
Supported file types: .json, .txt
Total characters: 0

How to Use:

Paste two or more JSON objects into the Input JSON Objects box. Separate them with a line break. For example:

{ "user": { "name": "Alice" } }
{ "user": { "age": 30 }, "active": true }

If you prefer, upload a .json or .txt file using the Choose File button. As soon as you enter valid JSON, the Merge JSON Objects tool builds a combined structure and displays it in the Merged Output box.

The output flashes every time it updates and includes a live character counter beneath it. Click Copy Output to copy the result or Export to File to download the merged object. Hit Clear All when you want to start over.

What Merge JSON Objects can do:

This tool takes multiple JSON inputs and merges them into a single, unified object. It handles nested keys correctly by combining them instead of overwriting. You can use it to layer config values, merge API responses, or join separate data structures without writing code. Everything happens in your browser, instantly, without uploads or external libraries.

Example:

Input:

{ "settings": { "theme": "dark" } }
{ "settings": { "notifications": true } }

Output:

{
  "settings": {
    "theme": "dark",
    "notifications": true
  }
}

Common Use Cases:

Merge JSON Objects helps when you’re merging config files, collecting JSON from different endpoints, or preparing form inputs for submission. It works great for debugging too just paste your pieces, and the tool handles the rest. It’s fast, local, and gives you complete control over the final output.

Useful Tools & Suggestions:

If you’re combining objects, Randomize a JSON Object can be helpful for testing how key conflicts might play out. Then, once merged, Flatten a JSON Object makes it easier to view the final structure without digging through layers.

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