Data Tools

Convert a CSV or TSV file to JSON entirely in your browser — choose the delimiter, header handling, and output shape. No uploads.

Convert a JSON array to CSV or TSV entirely in your browser — object keys become columns automatically. No uploads.

Convert an Excel workbook (XLSX) to CSV entirely in your browser — pick a sheet or convert them all. No uploads.

Convert a CSV or TSV file to an Excel workbook (XLSX) entirely in your browser — numbers arrive as real numbers. No uploads.

Query a CSV file with real SQL — SELECT, WHERE, GROUP BY, ORDER BY — right in your browser. Results as a table with CSV/JSON export. No upload.