Is this CSV to JSON converter free?

Yes, completely free with no signup and no usage limits.

Does my data leave my device?

No. All conversion runs in JavaScript inside your browser. Nothing is sent to any server.

Yes. The tool is mobile-first and works on iPhone Safari and Android Chrome.

将 CSV 数据转换为 JSON 数组或对象格式,粘贴或上传后即可下载。

100% client-side · no upload

CSV input

Delimiter First row is header Pretty print

JSON output

Paste your CSV data into the input area or upload a .csv file.
Choose the delimiter (comma, semicolon, tab, or pipe) and whether the first row is a header.
Click Convert to JSON to get the JSON output, then copy it with one click.

Is this CSV to JSON converter free?: Yes, completely free with no signup and no usage limits.
Does my data leave my device?: No. All conversion runs in JavaScript inside your browser. Nothing is sent to any server.
Does it work on mobile?: Yes. The tool is mobile-first and works on iPhone Safari and Android Chrome.

Last updated: 2026-05-20 By jarvisbox