developer-tools
CSV to JSON Converter
Convert common CSV text into a JSON array of objects in your browser, with explicit handling for headers, quoted commas, and blank rows.
Tool workspace
The interactive tool requires JavaScript.
Instructions
2. Choose auto detection or a fixed comma, semicolon, or tab delimiter, then decide whether the output should be pretty or compact.
3. Convert, review the row count and generated keys, then copy the JSON only after checking it against your import or API schema.
Paste CSV text, choose the delimiter behavior, and generate JSON locally. The first row becomes object keys, values stay as strings, and the parser handles common quoted fields. It is not a full spreadsheet engine and does not evaluate formulas or workbook files.
CSV to JSON conversion turns each data row into an object and uses the first CSV row as field names. This tool keeps values as strings, supports common quoted CSV fields, and runs in the browser. Review headers, row counts, extra columns, and target API rules before importing the result.
What this converter supports
The parser supports common CSV text with a header row, quoted fields, escaped double quotes, comma, semicolon, and tab delimiters. Empty headers are renamed to column_1 style keys, and repeated headers receive numeric suffixes.
What it intentionally does not do
It does not read XLSX files, evaluate spreadsheet formulas, infer numbers or dates, validate a target API schema, merge cells, preserve formatting, or stream very large files. Values are kept as strings so the conversion stays reviewable.
Review before importing JSON
Check that the delimiter was detected correctly, row counts match the source, headers are stable field names, and extra columns have not appeared from an unquoted comma. For production imports, validate the output against the destination system.