Turn CSV / TSV into a Markdown table, an ASCII-bordered table or an HTML table.
Paste CSV, TSV or any delimiter-separated rows (or pick the delimiter explicitly). Toggle “First row is header” and pick an alignment, then switch between Markdown / ASCII (bordered, column widths auto-fit content) / HTML. Output updates live and is one click to copy. The HTML tab also renders a preview below. Non-ASCII (e.g. Chinese) is fine — column widths use display width.