Free & Instant

Convert CSV to JSON Online — Free Data Converter

Transform CSV spreadsheet data into clean JSON for API use.

Upload your file

Drag & drop your .csv file here, or browse
Multiple files supported

.CSV.JSON

Maximum file size: 500 MB · Multiple files supported

100% private — files are processed in your browser, never uploaded

How It Works

CSV to JSON in 4 Easy Steps

Convert CSV to JSON in seconds — no sign-up, no upload, no catch.

  1. 1

    Upload CSV file

    Drag & drop your CSV or click Browse.

  2. 2

    Auto-select JSON

    JSON is pre-selected as the output.

  3. 3

    Convert in browser

    Each row is converted to a JSON object, preserving all columns.

  4. 4

    Copy or download

    Copy the JSON or download it as a .json file.

Use Cases

Why convert CSV to JSON?

  • Convert spreadsheet data for REST APIs
  • Prepare data for JavaScript applications
  • Transform exports for database imports
FAQ

Frequently Asked Questions

Files up to 500 MB are supported. Large files may take a few extra seconds.

Yes. The first row is treated as column headers and used as object keys in the JSON output.