JSON Merge

Merge two JSON files or objects online with this free JSON Merge tool. Whether you work with APIs, data, or web apps, you can use this tool to quickly combine JSON data into a single result. Deep merge: Recursively merge all objects, arrays will be connected, and the value of the second JSON will be used in case of conflict.

Just paste or upload your JSON files and get the merged result instantly.

How to Use the JSON Merge Tool

Whether you're working on web development projects, data analysis, or integrating with APIs, this tool makes it easy to merge JSON data.

  • Import JSON files:
    Paste or upload the two JSON files or objects you want to merge.
  • Get the merged result:
    Instantly see the merged JSON output and copy it to your clipboard.
  • Lowercase keys:
    Optionally, choose to convert all keys in the merged JSON output to lowercase for consistency.

Need to split or convert JSON? Try the JSON Formatter or JSON to CSV converter.

More JSON Tools

Beautify, convert, or validate JSON with our free tools. All tools support dark mode.

  • JSON Formatter: Format and beautify your JSON data for better readability and debugging.
  • YAML to JSON: Easily convert human-readable YAML to JSON. Useful when working with configuration files.
  • Query Parameters to JSON: Convert query strings to JSON for easier data handling in web applications.
  • JSON Schema Validator: Validate your JSON data against a schema to ensure it meets specific requirements and standards.

Benefits of Merging JSON Data

JSON (JavaScript Object Notation) is a widely used data format for APIs, configuration, and data exchange. Merging JSON data helps you:

  • Data Integration:
    Easily combine data from multiple sources for use in web applications or APIs.
  • Data Processing:
    Simplify workflows by merging related JSON objects or arrays.
  • Data Sharing:
    Share unified JSON data between different systems and platforms.

FAQs

  • Can I merge two JSON arrays?
    Yes, the tool will concatenate arrays if both inputs are arrays.
  • What happens if I merge two JSON objects with overlapping keys?
    Keys from the second object will overwrite those from the first.
  • Can I merge nested JSON structures?
    The tool merges at the top level. For deep merges, consider using a code library.
  • Is my data secure?
    All processing is done in your browser. Your data never leaves your device.
  • Can I use this tool for free?
    Yes, the JSON Merge tool is completely free to use.