Want to combine multiple JSON files into one JSON file?
Try Withdata Data File Converter, a desktop JSON merger for Windows, MacOS, and Linux, Merge multiple JSON files into one, Easy and Fast.
- Can run in GUI mode, Step by Step, just a few mouse clicks.
- Can run in Command line, for Scheduled Tasks and Streams.
- Convert files locally and privately, avoid uploading large JSON file(s) to online services.
- Support Windows, Linux, and macOS.
Download Withdata DataFileConverter
Combine multiple JSON files into one
Select source JSON files -> Set target JSON file -> Combine JSON files
Click “Start a New Convert” at task dialog.

then show the wizard.
Select source/destination file type.

1. Select source JSON files.

And Config first source JSON file.

2. Config target (output) JSON file.

3. Set rows options.

4. Combine JSON files.

After merging, you can view the output JSON file.

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