Free JSON to CSV converter
Turn API or business JSON into spreadsheet-friendly CSV without uploading sensitive data.
How to use this tool
- 1
Open JSON to CSV converter
Use it for this task: JSON arrays to Excel-ready CSV, nested field flattening, UTF-8 BOM, private browser processing.
- 2
Paste or upload the source content
Put the original text or file in the input area, then choose the conversion or formatting options.
- 3
Copy or download the converted result
Check the preview first, then copy the output or download the generated file.
Quick facts
| Runs locally? | Yes. Processing stays in your browser. |
|---|---|
| Uploads data? | No. Files and text are not sent to our servers. |
| Account required? | No signup or login. |
| Best for | ops exports, reports, API data, spreadsheets |
Top use cases
- JSON arrays to Excel-ready CSV, nested field flattening, UTF-8 BOM, private browser processing.
- Runs locally?: Yes. Processing stays in your browser.
- Uploads data?: No. Files and text are not sent to our servers.
- Account required?: No signup or login.
- Best for: ops exports, reports, API data, spreadsheets
FAQ
Does this tool upload my data?▾
No. The tool runs in your browser tab and does not send your input to our servers.
Can I use it offline?▾
After the app loads and the service worker is active, many tool pages can reopen without a network connection.
Is it free?▾
Yes. It is free to use and does not require an account.
What limits should I expect?▾
The practical limit is your device memory and browser performance, especially for large files.
Can I use this for sensitive data?▾
Yes for local processing, but always verify outputs before using them in critical workflows.
Which browsers work best?▾
Current Chrome, Edge, Firefox, and Safari versions work best for local file and crypto APIs.