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CSV CONVERT · ENCODE / JSON

Convert CSV Encoding or CSV to JSON

Convert and save CSV files as UTF-8, Shift_JIS, CP949, Big5, GB18030, or JSON. File contents never leave your browser.

Open this tool Specifications & limits

CSV processing stays in your browserYour files are not uploaded to a server.

Convert CSV encoding or save as JSON

Convert to UTF-8, Shift_JIS, CP949, Big5, or GB18030, or save the CSV as JSON.

How it works

Choose a CSV and input encoding, then check the preview.
Select an output encoding or JSON and set column types if needed.
Convert, review any formula warning, and download.

Before you start

Conversion stops rather than replacing unsupported characters.
Auto typing keeps values such as IDs with leading zeros as strings.

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