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CSV to JSON— Free & Private

Convert CSV data to JSON arrays instantly in your browser.

Processed in your browser. Nothing uploaded.

What Is CSV to JSON Conversion?

CSV to JSON conversion transforms tabular data from comma-separated values format into structured JSON arrays, making it ready for use in web applications, APIs, and databases. This is essential for developers who receive data in spreadsheet format and need to consume it programmatically. Our converter processes everything in your browser, ensuring your data stays private.

How to Use CSV to JSON

  1. Paste or upload CSV

    Paste your CSV data into the input area or upload a .csv file from your device.

  2. Configure parsing options

    Specify the delimiter, whether the first row contains headers, and how to handle data types.

  3. Download the JSON

    Preview the JSON output and download it as a .json file or copy it to your clipboard.

Why Use Our CSV to JSON Converter?

Runs entirely in your browser — no data uploaded to any server
Auto-detects delimiters (comma, semicolon, tab, pipe)
Uses the first row as JSON keys when headers are present
Handles quoted fields, escaped characters, and multiline values
Preview and validate JSON output before downloading
Processes large CSV files with thousands of rows efficiently
No account or installation required

Frequently Asked Questions

Does the converter handle CSV files with headers?

Yes. When the "first row as headers" option is enabled, the converter uses the first row values as JSON property names. Without headers, the output uses numeric indices or generic column names.

Can it handle special characters and quoted fields?

Yes. The parser correctly handles fields enclosed in quotes, escaped quotes within fields, commas inside quoted fields, and multiline values — all according to the RFC 4180 CSV standard.

What happens to empty cells in the CSV?

Empty cells are converted to empty strings by default. You can configure the converter to treat empty cells as null values instead, depending on your application's requirements.