Free CSV to JSON Converter — Convert CSV Files Online

About the Free CSV to JSON Converter

The FinancialDataTools.com CSV to JSON Converter is a free, browser-based tool for converting CSV and TSV files to JSON format. It runs entirely in your browser — no file is ever uploaded to any server.

How It Works

Drop your CSV file onto the left panel or click Open to browse. Your source data is previewed in a table. Click Convert to JSON to generate the JSON output in the right panel. Click Export JSON to download the result file.

Output Format

The converter produces a JSON array of objects. Each CSV row becomes one object. Column headers become keys. Empty cells are represented as null. The output file is named identically to the input, with the extension replaced by .json.

Privacy and Security

All file processing happens inside your browser using JavaScript. No file content is transmitted to any server. Your financial data stays private on your device.

Frequently Asked Questions

Is the CSV to JSON Converter free?

Yes, completely free with no signup required.

Does my file get uploaded to a server?

No. All processing is local in your browser. Nothing is uploaded.

What does the JSON output look like?

A JSON array of objects where each row is an object and each column header is a key.