CSV to JSON

Convert CSV files to JSON format online for free. Transform table data into lightweight JSON objects instantly.

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File is too large. The limit is 100 MB.

Supported: .csv (Max 100 MB)

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info About this tool
Convert CSV data to JSON objects. A fast utility for developers needing to serialize data for APIs.

File size: JSON output is typically similar in size to the CSV source: sometimes slightly larger due to key names being repeated per object.

Quality: The first row must contain headers. Rows with fewer columns than the header are padded with null values.

format_list_numbered How to convert
  • 1
    Upload CSV file.
  • 2
    The tool converts each row to a JSON object.
  • 3
    Download the JSON array.
help FAQ

What does the output look like?

The output is a JSON array of objects: [{"name": "Alice", "age": "30"}, {"name": "Bob", "age": "25"}]. Each CSV row becomes one object.

Are numbers converted to numeric JSON types?

Yes. Cells that contain only numeric values are output as JSON numbers. Text values are output as strings.

What if my CSV has missing values?

Missing values in a row produce null for that key in the corresponding JSON object.

Can I convert a large CSV?

Yes, files up to 100 MB are supported. Very large files with millions of rows may take a few seconds to process.
lightbulb Common use cases
  • check_circle Importing exported CRM or database data into a JSON-based API
  • check_circle Creating JSON fixtures or seed data for web app development
  • check_circle Feeding spreadsheet data into no-code tools that require JSON
  • check_circle Transforming analytics exports for use in dashboards or BI tools
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