CSV to JSON Converter
Convert CSV data to JSON - handles quoted fields, commas inside values, and multiline cells correctly.
Paste or upload CSV data below - this tool uses a proper CSV parser (not a naive comma-split) so quoted fields and embedded commas convert correctly.
Each CSV row becomes one JSON object using the header row as keys - see the Data Integrity notes below for how unusual rows are handled.
Why a Real CSV Parser Matters
Splitting CSV on commas naively breaks the moment a field contains a comma inside quotes (like "Smith, John") or a quoted field spanning multiple lines. This tool implements a proper RFC 4180-style parser that correctly handles quoted fields, escaped quotes (""), and embedded commas/newlines.
How to Use It
- Paste CSV text or upload a .csv file.
- The first row is treated as column headers by default.
- Click Convert - each row becomes a JSON object keyed by the headers.
- Copy or download the resulting JSON.
Data Integrity Notes
A row with fewer values than headers gets missing keys omitted (not silently set to empty string) so you can tell the difference; a row with extra values beyond the header count is flagged as a warning rather than silently dropping the extra data.
Limitations
This processes data entirely in your browser and applies a practical size limit to avoid freezing the tab on extremely large files - for very large CSV files, consider splitting them first.