How to Convert CSV to JSON Online (Free, No Upload)

Convert CSV to JSON in seconds, right in your browser, with no install and no account.

CSV is how spreadsheets and databases export data. JSON is what websites, apps and APIs read. Moving data from one to the other by hand is slow, and one wrong comma can break everything.

The converter turns each CSV row into a JSON object and uses your first row as the key names. Numbers and true/false values are detected, so you get clean data instead of everything wrapped in quotes.

Your file is processed in your browser and is not uploaded to a server, so it is safe to use with customer or business data.

Open the CSV to JSON converter

How to use the CSV to JSON converter: step by step

1. Open the CSV to JSON converter.
2. Drop your file into the box, or paste the data.
3. Click Convert.
4. Copy the result, or click Download to save the JSON file.

When to use the CSV to JSON converter

• Sending spreadsheet data to an API
• Loading a CSV export into a JavaScript or Python project
• Preparing sample data for a web app
• Creating mock API responses

Tip: Turn off type detection if every value must stay text, for example ZIP codes with leading zeros.