How do I know which two key names to fill in?

You don't have to remember them. Once you paste or upload a JSON array, the tool auto-detects every available key and renders them as clickable buttons — one tap fills "Swap Fields 1" or "Swap Fields 2", preventing typos. Key names are case-sensitive.

Can I swap keys inside nested objects?

No. This tool only swaps first-level keys within objects of a JSON array. For nested-structure edits, switch to JSON Node Edit, which uses JSONPath to find and modify nodes at any depth.

What if some objects in the array are missing one of the keys?

The system keeps processing the other objects and prints a notice telling you which entries are missing the key — no abort. Always back up important data first; exported filenames auto-append a timestamp so you can keep multiple versions side by side.

Will it lag on large files?

For big datasets, use the file upload rather than pasting into the text box — processing stays smooth. All processing happens locally in your browser — data never leaves your machine.

I don't want to swap — I want to copy one field's value to another. What should I use?

Use JSON Value Transformer. It defines arbitrary key mappings (including nested JSONPath) and copies values from source to target paths — perfect for multilingual template initialization. This tool is for "two fields literally trading places".

JSON Key-Value Swap

The JSON Key-Value Swap Tool can automatically swap the values of two specified keys in a JSON array, making your data processing more convenient.

JSON Value Swapper Interface

Features

Automatically detects and displays all available keys in the JSON.
Swaps the values of two keys in each object of a JSON array.

Usage Steps

Input JSON Data:
- Upload File: Drag and drop a file containing a JSON array into the upload area, or click to select a file (supports .json and .txt formats).
- Paste Data: Directly paste your JSON array data into the text box.
Select the Keys to Swap:
- The system will automatically analyze your data and display all available key names.
- Click on the displayed key name button to quickly select, or type into the "Swap Fields 1" and "Swap Fields 2" inputs.
- The values corresponding to these keys will be swapped during the processing.
Execute the Swap Operation:
- Click the "Start Swap" button to process the data.
- If some objects are missing the specified keys, the system will display a prompt.
Manage Results:
- After the swap is complete, the result will be displayed in the lower section.
- You can:
  - Copy the complete result to the clipboard.
  - Copy the JSON nodes without wrappers.
  - Export the result as a JSON file, with the filename automatically appended with a timestamp.

Advanced Options

Reset: Clears all uploaded files, input content, and results.
Large-file friendly: when processing large JSON data, upload the file instead of pasting it.

Notes

This tool only supports swapping the first-level key values of objects in a JSON array and does not support swapping keys in nested objects.
JSON key names are case-sensitive, so please ensure the correct key names are entered.
If some objects in the array are missing the specified keys, the system will continue processing and provide a prompt.
It is recommended to back up your original data before processing important data.
Ensure your JSON format is correct, as the tool can only process valid JSON data.

With this simple and easy-to-use tool, you can quickly swap key-value pairs in a JSON array, saving time on data processing and boosting your work efficiency.

#JSON Key-Value Swap

#Features

#Usage Steps

#Advanced Options

#Notes

JSON Key-Value Swap

Features

Usage Steps

Advanced Options

Notes