CSV to JSON Converter

Convert CSV rows and headers into a downloadable JSON array locally.

How to use

Choose a CSV file with column headers. Quoted fields, embedded commas and newlines are supported.
The first row becomes JSON object property names. Duplicate or blank headers are rejected to avoid silent data loss.

CSV is a row-based, delimiter-separated table format. JSON is a structured text format that can represent arrays of named objects.

Text input is read as UTF-8; numeric cells are intentionally kept as strings to prevent leading-zero data loss.

They remain strings to protect values such as ZIP codes and account identifiers.

The parser detects comma, semicolon, or tab separators from the header row.