CSVTools.dev

CSV to JSON

Convert any CSV file to JSON format instantly. Perfect for developers, data analysts, and anyone working with APIs.

100% Private — Files stay in your browserInstant processing

Drop your CSV file here

Supports .csv files up to 5MB

How to csv to json

  1. Upload your JSON file.
  2. The file will be processed instantly in your browser — no server upload required.
  3. Preview the result in the data table below.
  4. Click "Download" to save the output file to your device.

CSVTools.dev provides free online tools for working with CSV and JSON data. All processing happens locally in your browser, ensuring your data remains completely private and secure. No registration required.