Show HN: CSVtoAny, CSV Local File Converter https://ift.tt/umDAgZP

Show HN: CSVtoAny, CSV Local File Converter About two weeks ago I built a small text-comparison tool as a simple front-end project. Recently I ran into another annoyance: converting CSV/Excel/JSON with tools that upload files to servers, feel slow, or impose limits. Since I prefer privacy-first tools, I built this one as well. 100% local: All parsing and conversion run in Web Workers. No uploads. Format support: CSV ↔ Excel (.xlsx), JSON, SQL, XML, Markdown. Smart column restoration: Fixes copied tables that collapse into a single column (enable under “More Options”). No size limits: Only limited by your RAM. My goal is to grow this into a small, one-stop CSV/format toolbox. It just launched, so there may be rough edges — feedback is welcome. Tech Next.js, Tailwind, SheetJS, Web Workers, i18next. Looking for feedback Try it with your odd CSVs: unusual delimiters, quoted newlines, mixed encodings, huge files, broken pasted tables. Also curious whether the column-restoration feature feels intuitive. Thanks for checking it out! https://csvtoany.com/ December 4, 2025 at 11:45PM

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