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Rotina Diária

CSV to JSON

Convert CSV spreadsheets to JSON with delimiter detection, data types, and header support.

Processed on your device. Nothing you type is sent anywhere.

How to use: CSV to JSON

  1. Paste your CSV data or open a file exported from a spreadsheet.
  2. Choose whether the first row is a header and whether values should be converted to numbers.
  3. Copy or download the formatted JSON.

About this tool

The parser follows RFC 4180: quoted fields can contain delimiters, line breaks, and escaped double quotes (""). The delimiter is automatically detected as a comma, semicolon, tab, or vertical bar.

Values like 007 stay as text to preserve leading zeros (ZIP codes, IDs). Columns with a period in the name, such as address.state, can be converted to nested objects.

Frequently asked questions

My CSV from Excel has garbled characters. What should I do?

In Excel, save the file as “CSV UTF-8.” Files saved with older encodings (ANSI/Windows-1252) may show garbled characters when read as UTF-8.

What happens when headers are repeated?

A number is added to the name (name, name_2) so no data gets overwritten.

Is it really free? Is there a daily limit?

It's free with no daily limits. Processing happens on your device, so there's no per-use cost and no need to limit you.

Does it work on phones?

Yes. The site works in any modern browser on Android, iPhone, Windows, Mac, and Linux—no installation needed.

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