Want to convert and combine multiple CSV files into a single JSON file?
Try Withdata Data File Converter, a desktop CSV to JSON converter for Windows, MacOS, and Linux, Merge multiple CSV to JSON, 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 CSV file(s) to online services.
- Support Windows, Linux, and macOS.
Convert and combine multiple CSV files into a single JSON file
Select source CSV files -> Set JSON file -> Merge multiple CSV files into one JSON file
Click “Start a New Convert” at task dialog.

then show the wizard.
Select From “Files” “CSV” To “File” “JSON”.

1. Select source CSV files.

And config first source CSV file.

2. Config target JSON file.

3. Set rows options.

4. Merge multiple Csv files into one JSON file.

After converting / merging, you can view JSON file.

More about CSV to JSON converter
See Video: Convert and merge CSV files into a single JSON file without coding
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