Free converters and text tools for everyday data
Small data jobs – turning a spreadsheet into JSON, cleaning up an export, counting words for an essay, making a QR code for a poster – shouldn’t require installing software or pasting confidential data into unknown websites. These free converters run in your browser, so customer lists, API responses and drafts stay on your device.
Which converter do I need?
- Spreadsheets and data: CSV ⇄ JSON converts both ways with delimiter detection and nesting; Excel ⇄ CSV opens XLSX, XLS and ODS and exports CSV, TSV or JSON; XML ⇄ JSON handles feeds, sitemaps and SOAP responses.
- Writing and publishing: Markdown to HTML converts with a live preview and sanitised output; Word Counter & Case Converter counts words, characters, reading time and SEO limits.
- Developer helpers: Base64 Encode/Decode for text, files and data URIs.
- Sharing: QR Code Generator creates static codes for links, Wi-Fi, contacts and more, as PNG or print-ready SVG.
Private by design
Because nothing is uploaded, these tools are safe for internal data, and they keep working offline once the page has loaded. If a file is too large for your browser, split it first and convert it in parts.