All CSV and JSON parsing, transformations, and serialization execute 100% client-side in your web browser's JavaScript V8/SpiderMonkey engine. Zero data, rows, or confidential database records are ever uploaded to our servers or stored in any external cloud datastore.

Yes, our parser is fully compliant with IETF RFC 4180. It properly handles fields containing commas, line breaks (CRLF or LF), and escaped double quotes ("") without splitting columns prematurely.

The auto-detection engine analyzes line-by-line consistency for standard commas (,), European semicolons (;), tab characters (\t / TSV), and pipe symbols (|), selecting the delimiter with the highest regularity across rows.

Yes. Simply switch the Direction toggle to 'JSON to CSV' or click the 'Swap Direction' button. You can provide an array of objects or a 2D array, and download the resulting CSV with optional quote enclosing.

You can export to 5 structures: Array of Objects ([{...}]), 2-D Positional Array ([headers, row1, row2]), Keyed Map/Hash indexed by your choice of primary key column, Column-Oriented Dictionary ({col: [...]}) optimal for Pandas and NumPy DataFrames, and NDJSON (Newline Delimited JSON) for BigQuery and Elasticsearch.

Yes, when 'Parse nested JSON in cells' is enabled, cell values formatted as valid JSON arrays or objects (such as tags or metadata) are automatically parsed into true JavaScript arrays and nested objects rather than raw escaped strings.

Transpose rotates your tabular matrix by 90 degrees, turning rows into columns and columns into rows. This is especially useful for pivoting financial balance sheets or time series metrics where dates or metrics appear across columns instead of rows.

Yes. Click 'Copy Markdown' (or press Alt+M) to instantly copy a clean GitHub Flavored Markdown table with aligned headers and dividers ready to paste directly into GitHub PRs, issues, or documentation.

Press 'Alt+P' for DevToys Smart Clipboard Auto-Detect, 'Alt+C' or 'Ctrl+Enter' to copy converted output, 'Alt+M' to copy Markdown table, 'Alt+T' to transpose matrix, 'Alt+V' to toggle 2-column split vs stacked layout, 'Alt+S' for API snippets, 'Alt+K' or '?' for shortcuts guide, 'Alt+R' for random presets, '/' to focus input, and 'Escape' to clear or dismiss modals.

Click the 'API Code' quick action button (or press Alt+S) to view copy-pasteable boilerplate code in TypeScript/Node.js, Python, Go, Rust, Java, and Bash utilizing standard libraries with zero external dependencies, or download standalone script files (.ts, .py, .go, .rs, .java, .sh) directly with one click.