CSV to JSON

Convert a CSV spreadsheet to JSON objects locally. Review the output before downloading; no account or upload required.

Drop a file here

or click to choose files · paste from clipboard

Files stay on your device — never uploaded

Processed on this device · Maximum file size 15 MB

How to convert CSV to JSON

  1. Choose a .csv file from your device.
  2. Review the parsed JSON output. The first CSV row is treated as the column names.
  3. Download the converted .json file.

Files are limited to 15 MB and 100,000 rows. Column names should be unique for predictable JSON keys.

FAQ

Are my spreadsheets or documents uploaded?

No. Data conversion runs locally in your browser. The selected files and results are not sent to our servers.

What are the data file limits?

Input files are limited to 15 MB and tabular or text data to 100,000 rows. PDF text extraction is limited to 200 pages. Scanned PDFs are not processed with OCR.

How does CSV conversion choose field names?

CSV files use the first row as column headers. JSON objects are created using those headers. Keep header names unique for predictable results.

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