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CSV to JSON

Convert CSV to JSON and JSON to CSV, with separator detection (comma, semicolon or tab).

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Paste the CSV or JSON.

Available in: PortuguêsEspañolEnglish

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CSV to JSON: what it is for

The tool converts CSV spreadsheets to JSON and back. It detects the separator on its own, including the semicolon used by Excel in many locales, and respects quoted fields.

Everything happens in the browser, so the data never leaves your computer.

How to use

  1. Paste the CSV or JSON.
  2. Choose the direction and separator.
  3. Copy the result.

When to use it

  • Importing spreadsheets into systems and APIs.
  • Opening JSON in Excel.
  • Preparing test data.

Frequently asked questions

Does it work with CSV from Excel in other languages?

Yes. Excel in many European and Latin American locales uses semicolons, and the tool detects the separator on its own.

Does it accept fields with commas inside?

Yes, as long as they are in quotes, as in the CSV standard.

Is it really free?

Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.

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The tools are provided as is, without warranty. We are not responsible for the results or for how they are used.