PDF Mikata

Convert CSV and JSON

When you need data in another format.

Your text is never sent anywhere. Everything is processed on this device.

  1. 1Choose a direction
  2. 2Paste your data
  3. 3Copy or save the result
Convert
Delimiter (CSV)

Your data is converted on this device. Nothing is sent anywhere.

Done

🔒 Your files are never sent to an external server. Everything is processed safely inside this browser.

How to use

  1. Choose CSV → JSON or JSON → CSV under "Convert".
  2. Paste your data into the input box.
  3. Copy the result or save it as a file.

How it works

  • For CSV you can choose comma, tab or semicolon as the delimiter.
  • JSON → CSV turns an array of objects into a table.
  • CSV files are saved with a mark at the start so Excel does not garble them.

Notes

  • Very large data may make the page slow.
  • Nested JSON values are kept as text in a single cell.

FAQ

Is the pasted data sent anywhere?

No. Everything is processed inside the browser on your device.

The CSV looks garbled in Excel

CSV files saved with "Save as file" are prepared so Excel can open them correctly.

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Guides for this tool

How to Convert CSV to JSON (Free)How to Convert JSON to CSV and Open It in ExcelUsing the First Row as HeadersConverting Tab- or Semicolon-Separated DataNotes on Nested JSONIs My Data Uploaded?When the Conversion Fails

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