File Format Converter

Five bidirectional conversion pairs: CSV ↔ TSV, JSON ↔ XML, Markdown ↔ HTML, YAML ↔ JSON, and INI ↔ JSON. That covers 8 total formats: CSV, TSV, JSON, XML, Markdown, HTML, YAML, and INI.

Paste your text and click "Detect Format". The tool analyzes the content: JSON starts with { or [, XML has <tags>, YAML has key: value patterns, INI has [sections] or key=value, CSV has commas, TSV has tabs, and Markdown has # headings, **bold**, or list markers.

CSV/TSV conversion is exact (delimiter swap). JSON/XML conversion handles nested objects and arrays. Markdown/HTML covers headers, bold, italic, links, code blocks, and lists. YAML and INI conversion handles flat key-value structures. For complex nested YAML or deeply nested XML, results may vary - review the output before using in production.

Yes. Click the "Upload" button above the input panel and select a file. The tool reads the file contents and automatically detects the format. Supported extensions: .csv, .tsv, .json, .xml, .md, .html, .yaml, .ini, and .txt.

Yes. After conversion, click the "Download" button next to the output panel. The file is downloaded with the correct file extension (.csv, .tsv, .json, .xml, .md, .html, .yaml, or .ini) and MIME type for the target format.

No. All conversions happen entirely in your browser. No data is uploaded, processed on a server, or stored anywhere. The tool works offline after the first page load.

Yes, completely free with no signup required. No limits on the number of conversions, file sizes (browser memory permitting), or format pairs. Use it as much as you need.

Yes. Click the swap button (double arrow icon) between the "From" and "To" format selectors. This reverses the conversion direction and swaps the input and output text, making it easy to convert back and forth.

JSON/XML conversion handles standard nested objects and arrays but may not preserve XML attributes, namespaces, or CDATA sections. YAML conversion handles flat key-value structures - complex nested YAML with lists-of-lists may not convert perfectly. Markdown conversion covers common syntax but may miss tables or extended Markdown features.