JSON Merge
Deep-merge two JSON objects.
Combine two JSON objects
This deep-merges two objects, so nested structures combine rather than one wholesale replacing the other. Where both define the same key, the second wins — useful for layering config over defaults.
It is how you layer configuration: start with defaults, merge an environment-specific object on top, and let the second object override only the keys it defines.
Know the precedence
Arrays are replaced, not concatenated, which is the usual convention. The merge runs in your browser and nothing is uploaded. Your objects are merged on your device and never uploaded.
Frequently Asked Questions
What does this json merge do?
Deep-merge two JSON objects and inspect the combined output.
Can I use this with private work data?
Yes. The tool runs entirely in your browser, so pasted data is not uploaded, logged, or stored by Bushe.co.
What should I check before using the output?
Review the preview or output for delimiter issues, unexpected blank rows, and field names that may need cleanup before importing elsewhere.
Is this tool free?
Yes. It is free to use and does not require an account.
More free browser utilities for data cleanup, formatting, and developer workflows.