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

Related Data & Code Conversion Tools

Need to convert other formats? Try these popular free online tools.

.json.xml
JSON to XML
.yaml.json
YAML to JSON
.xml.json
XML to JSON
.toml.json
TOML to JSON
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.