What delimiters are supported?

The converter supports comma (,), semicolon (;), tab, and pipe (|) as delimiters. Choose the one that matches your CSV format.

How does type inference work?

When enabled, the converter automatically detects numbers, booleans (true/false), and null values, converting them to their proper JSON types instead of strings.

Can I convert JSON back to CSV?

Yes! The tool supports bidirectional conversion. Switch to "JSON to CSV" mode to convert JSON arrays back to CSV format.

CSV to JSON Converter - Convert CSV to JSON Online Free

How to Use the CSV to JSON Converter

Paste your CSV data into the input field on the left. The converter will automatically parse your CSV and display the JSON output on the right. You can customize the delimiter, enable or disable header row detection, and choose between different JSON output formats.

Features

Bidirectional Conversion - Convert CSV to JSON or JSON to CSV
Custom Delimiters - Support for comma, semicolon, tab, and pipe
Header Detection - Use first row as field names or column indices
Type Inference - Automatically detect numbers, booleans, and nulls
Preview Table - Visualize your CSV data before conversion
Download - Save converted data as .json or .csv file

Works great with the JSON Formatter for beautifying output and YAML Converter for further format transformations.

What is CSV?

CSV (Comma-Separated Values) is a simple text format for storing tabular data. Each line represents a row, and values are separated by a delimiter (usually a comma). CSV is widely used for:

Exporting data from spreadsheet applications (Excel, Google Sheets)
Database imports and exports
Data exchange between different systems
Log files and data logging

CSV vs JSON: When to Use Each

Use CSV when: You need simple tabular data, compatibility with spreadsheet software, or human-readable flat data structures.

Use JSON when: You need nested data structures, type preservation, API communication, or configuration files.

Frequently Asked Questions

Is my CSV data secure?

Yes! All CSV processing happens entirely in your browser using JavaScript. Your data is never uploaded to any server or stored anywhere.

What if my CSV uses a different delimiter?

Use the delimiter dropdown to select the appropriate separator for your data. The tool supports comma, semicolon, tab, and pipe delimiters.

How do I handle CSV files with headers?

Enable the "First row is header" checkbox to use the first row as field names in the JSON output. When disabled, columns will be numbered (0, 1, 2, etc.).

Can I convert large CSV files?

Yes, but for very large files (over 10MB), performance may vary depending on your browser. All processing happens client-side, so there are no server-side file size limits.

CSV to JSON Converter