CSV to JSON

How to use CSV to JSON

1. Paste your text or choose a supported file. Supported inputs: CSV, TSV.
2. Review the settings, then start. Your content is processed in your browser and never uploaded.
3. Check the output and download it. Download before closing the tab; local results are not saved.

Useful to know

Read UTF-8 CSV with automatic or manual delimiter selection. Use the first row as headers or generate column names. Values remain strings unless typed conversion is enabled.

String mode preserves leading zeros and identifiers. Duplicate or empty headers and inconsistent row lengths are rejected.

Supported formats and limits

Up to 5 MB per file. One input per job. Outputs use JSON format. Busy queues may ask you to try again shortly.

Do I need an account?

No. Every tool works for guests. Your favorites and saved settings stay on this device and do not include file contents.