Free to use No account required
CSV to JSON Converter
Convert a CSV file into formatted JSON with header validation and a preview.
How to use CSV to JSON Converter
- Choose a CSV with a header row.
- Convert it and review the JSON preview.
- Download the complete JSON file.
What to expect
Quoted commas, embedded line breaks, and escaped quotes are supported. Values are kept as strings to preserve leading zeros, account numbers, and date formatting. Blank rows are skipped; inconsistent row lengths are reported instead of silently dropping data.
Limits and privacy
One UTF-8 CSV up to 5 MB. The first row must contain unique, non-empty headers. Values remain strings.
Common questions
Can I upload an Excel workbook?
Export the sheet as CSV UTF-8 in your spreadsheet application first. This tool accepts CSV, not XLSX workbooks.