CSV to JSON Converter

Q: Can I upload a CSV file?

Yes, use the file upload to select a .csv file from your device.

Q: What if my CSV doesn't have headers?

Uncheck 'First row is headers' and the tool will use col0, col1, col2 as keys.

Q: Is my data stored or sent anywhere?

No. All conversion happens in your browser.

Transform tabular CSV data into structured JSON format. Upload a file or paste data — perfect for importing spreadsheets into applications.

First row is headers Upload CSV:

About This CSV to JSON Converter

This free tool transforms tabular CSV data into structured JSON format. Perfect for developers importing spreadsheet data into applications, converting database exports, or preparing data for API consumption. All processing happens in your browser.

Features

Automatic Header Detection — First row becomes JSON keys
File Upload — Upload .csv files directly instead of pasting
Validation — Detects inconsistent column counts and reports errors
Statistics — See row count, column count, and output size
One-Click Download — Save the JSON file for use in your applications

How to Use

Paste CSV data or upload a .csv file
Toggle "First row is headers" if your CSV has a header row
Click Convert to JSON to parse the data
Review the formatted JSON output and download if needed

Frequently Asked Questions

What CSV format is supported?

Standard comma-separated values with optional header row. Each row should have the same number of columns.

Can I upload a CSV file?

Yes. Use the file upload input to select a .csv file from your device. The content will be loaded into the text area.

What if my CSV doesn't have headers?

Uncheck "First row is headers" and the tool will use column names like col0, col1, col2 as JSON keys.

Is my data stored or sent anywhere?

No. All conversion happens entirely in your browser. Nothing is sent to any server.