CSV to JSON
Convert CSV data to JSON locally in your browser.
Source CSV
Paste data here or upload a CSV, TSV, or text file. The conversion stays on your device.
JSON output
Copy the result or download it as a JSON file.
No JSON yet.
Paste CSV data above, choose your delimiter, then convert it here.
Turn CSV rows into JSON objects without uploading the file
This tool reads CSV text in your browser, detects or uses the delimiter you choose, and converts the rows into JSON objects. It is useful when you need to move data from spreadsheets, exports, and admin tools into APIs or scripts.
Benefits: Keep the data local, auto-detect common delimiters, choose whether the first row becomes headers, and download the JSON output instantly.
Best for: API prep, spreadsheet exports, quick ETL tasks, and turning tabular text into structured JSON.
Limitations and tradeoffs
- Messy CSV files with unbalanced quotes may need a quick cleanup before conversion.
- If your data has no header row, the output uses generated column names.
- Very large CSV files may take a moment because parsing happens in the browser.
Read this before you convert
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Next step
Need a different route? Check the next tool in this cluster instead of starting over.
Browse Developer toolsQuestions before you use it
Which delimiters can it use?
Auto-detect mode supports comma, tab, semicolon, and pipe. You can also force one manually if needed.
Can I upload a file instead of pasting text?
Yes. Upload a CSV, TSV, or text file and the contents will load into the editor for conversion.
Does it keep the file private?
Yes. The conversion runs locally in your browser, so the CSV never has to leave your device.