CSV to JSON Converter

✓ 100% Free
✓ No upload — runs in your browser
✓ No signup
✓ No ads

Free online CSV to JSON converter: convert a CSV file to a JSON array in your browser. Each row becomes a JSON object with the column headers as keys.

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Drop a CSV file here or click to browse

Supports .csv

How to Convert CSV to JSON

Select or drag your CSV file into the upload area above.
Click Convert to JSON. Processing happens instantly in your browser.
Download the .json file.

Convert CSV to a JSON Array Online

This CSV to JSON converter turns each row of your spreadsheet into a JSON object, keyed by the column headers, and outputs a clean JSON array ready to paste into an API, app, or database seed. It runs entirely in your browser — no upload, no signup, and it handles large CSV files efficiently.

Common Use Cases

Prepare CSV data for use in a REST API or web application.
Convert a spreadsheet export to a JSON array for JavaScript processing.
Transform tabular data into a format suitable for NoSQL databases.
Generate JSON fixtures for testing or seeding a database.

Frequently Asked Questions

How do I convert a CSV file to JSON?

Drop your CSV above and click Convert to JSON. The tool builds a JSON array — one object per row, keyed by the column headers — and downloads it as a .json file.

What is the output format?

The output is a JSON array where each element is an object with the CSV column headers as keys.

Does it handle large files?

Yes. PapaParse is used for efficient parsing and can handle large files in the browser.

Are my files uploaded to a server?

No. All processing happens entirely in your browser. Your files never leave your device.