Data converter

CSV to JSON Converter

Turn spreadsheet-style CSV data into JSON for APIs, apps, scripts, and data cleanup.

Open the converter

How to convert with this CSV to JSON converter

  1. Open the converter and choose your output format.
  2. Drop your file onto the upload area or choose it from your computer.
  3. Click Start Converting and wait for your browser to process the file.
  4. Download the finished file and review the result before using it.

Why browser-based conversion helps

Your files are processed on this device instead of being sent through a server upload queue. That can be faster for quick jobs and better for private documents, images, and data files you do not want sitting in someone else's storage.

The first row should contain column names for the cleanest JSON keys.

Frequently asked questions

How does CSV become JSON?

Each CSV row becomes one JSON object, using the first row as field names.

Is my CSV uploaded?

No. The file is processed in your browser.

What kind of CSV works best?

Flat tables with a header row work best.

Can this handle huge spreadsheets?

Very large files may be limited by your browser memory.