offlinewebtools.com — free, watermark-free browser tools that stay on your device with nothing uploading to our servers

CSV ↔ JSON Converter

Convert between CSV and JSON with custom delimiters and robust batch processing

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

Conversion Options

Delimiter

Batch mode

Drag & drop one or more CSV files, or click here to browse.

Accepts .csv and text files.

Drag & drop one or more JSON files, or click here to browse.

Accepts .json and text files.

Yes, you can drag and drop or browse multiple `.csv` and `.json` files, then run batch mode for combined conversion.

Supports JSON arrays and single objects. Use one object or array per file when batch importing files.

All conversion runs locally in your browser, so very large files may require more memory and take longer.

If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.