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JSON Merge Tool Examples

Review practical JSON Merge Tool examples so you can understand expected input, output, and common patterns faster.

Why examples matter for JSON Merge Tool

Use this JSON Merge Tool to combine multiple JSON objects into a single merged object. It is useful for building test payloads, combining config fragments, merging exported data blocks, and simplifying workflows where several JSON objects need to become one result for debugging, integration, or reuse.

Example pages are especially useful for developer tools because they show what good input looks like, what kind of output to expect, and how the tool behaves in common scenarios.

JSON Merge Tool examples

Merge two simple objects

Input

{"name":"John"}
---
{"age":30}

Output

{
  "name": "John",
  "age": 30
}

Useful for combining two small JSON fragments into one object.

Merge with overwrite

Input

{"role":"user","active":false}
---
{"active":true}

Output

{
  "role": "user",
  "active": true
}

Helpful when later blocks should override earlier values for the same key.

How to use these examples

  1. Paste one JSON object per block separated by a line with ---
  2. Click Run Tool to merge the objects
  3. Review the merged JSON result
  4. Copy the output into your workflow or test data
  5. Adjust the object order if you want later values to override earlier ones

Common mistakes in sample input

One of the blocks is invalid JSON

Fix: Validate each block separately before trying to merge them.

The input contains arrays instead of objects

Fix: This version expects JSON objects as the merge input.

The user is surprised that later keys overwrite earlier ones

Fix: Remember that when the same key appears again, the later value replaces the earlier value.

Next steps

After reviewing these examples, run the live tool with your own input. If your task involves a follow-up step, the related page can help you move to the next tool in the workflow.

Run the main tool

Open the main JSON Merge Tool page and test your own real input.

Open JSON Merge Tool