Three straightforward steps
- Choose or paste the input requested by this tool.
- Configure the options and run the operation locally.
- Review and download or copy the result.
Data TOOL
JSON to CSV
Convert an array of JSON objects into standards-friendly CSV.
ON-DEVICESelected input is processed in this browser.
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The selected input stays under your control
On-device processing means the input is handled by browser APIs on the device running this page. Closing or refreshing the page normally clears the active in-memory working session.
Read the Privacy Policy →Flatten a JSON object array into portable CSV
Create a tabular export from records with consistent property names.
How to use it
- Paste a JSON array of objects.
- Review the discovered columns and nested values.
- Convert and open the CSV in a compatible application.
Supported input
- Valid JSON arrays
- Objects with scalar values suitable for cells
Worked example
Convert an API response containing customer objects into CSV for spreadsheet review.
Limitations
- Deep nested objects do not map naturally to flat columns.
- Arrays inside cells may need prior normalization.
Troubleshooting
- Wrap a lone object in an array when appropriate.
- Format and validate the JSON before converting.
Tool-specific questions
How are commas escaped?
CSV fields are quoted according to standard delimiter rules.
Can it flatten nested JSON?
Only limited cell representation is possible; normalize complex structures first.
Before you process
Can I use this json to csv online without uploading my input?
Yes. This tool is labelled On-device, so the selected input is processed in your browser and is not sent to a ForgeMyFile processing API.
What happens if the browser cannot process it?
The tool shows a readable error and stops. It does not silently fall back to a cloud upload.
Why can performance differ between devices?
The browser is doing the work locally, so speed and practical file size depend on available memory, CPU and browser capabilities.