💻 Developer Tools

CSV to JSON Converter

Convert between CSV and JSON formats with custom delimiters and header options.

The CSV to JSON Converter is a completely free online tool that requires no sign-up or account. Convert between CSV and JSON formats with custom delimiters and header options. Instant results in your browser — no downloads, no limits.

Input CSV
Output JSON

What is CSV to JSON Converter?

The CSV to JSON Converter is a free online tool that transforms comma-separated value (CSV) data into structured JSON arrays instantly. CSV is a common export format from spreadsheets, databases, and analytics platforms, while JSON is the standard format for web APIs and JavaScript applications. This tool bridges the gap, letting you convert tabular data into usable JSON with configurable delimiters, header row detection, and pretty-print output.

How to Use the CSV to JSON Converter

  1. Paste your CSV data into the input field or upload a .csv file.
  2. Confirm that the first row is treated as the header row for JSON keys.
  3. Select your delimiter — comma, semicolon, or tab — if needed.
  4. Click Convert to generate the JSON array output.
  5. Copy or download the resulting JSON for use in your application.

Frequently Asked Questions

What is the difference between CSV and JSON?
CSV stores tabular data as plain text with rows and delimited columns, while JSON stores structured data as key-value pairs and arrays, making it more suitable for nested data and APIs.
Does the converter support custom delimiters?
Yes, you can specify comma, semicolon, tab, or pipe as the delimiter to handle CSV files exported from different sources and locales.
What happens if my CSV has missing values?
Missing values are converted to empty strings or null values in the JSON output, preserving the structure of each row even when data is incomplete.
Can I convert JSON back to CSV?
Yes, the tool supports bidirectional conversion so you can also paste a JSON array and export it as a CSV file.

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