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All conversion runs in your browser. No data is uploaded.
Free tool
Data Converter
Convert between CSV, JSON, XML, YAML and Markdown — all in your browser.
About this tool
A practical data converter for developers, analysts and content writers. Convert CSV to JSON for APIs, JSON to CSV for spreadsheets, JSON to XML for legacy systems, JSON to YAML for config files, and Markdown to HTML for the web. Paste your input on the left and read the converted output on the right — then copy it to the clipboard or download as a file. Unlike a plain JSON formatter, this tool changes data between formats, not just whitespace.
How to use the Free Data Converter — CSV, JSON, XML, YAML & Markdown
- Pick the conversion direction (e.g. CSV → JSON).
- Paste your data into the input panel (or click Load sample).
- Click Convert to produce the output.
- Copy the result to the clipboard or download it as a file.
Frequently asked questions
- How is this different from your JSON formatter?
- The JSON formatter only pretty-prints or minifies JSON. This data converter changes data between formats — CSV ↔ JSON, JSON ↔ XML, JSON ↔ YAML and Markdown → HTML.
- Is my data uploaded anywhere?
- No. All parsing and conversion runs locally with browser JavaScript libraries (js-yaml and marked). Nothing leaves your device.
- Why does JSON to CSV need an array?
- CSV is a table of rows. We expect a top-level array of objects so each object becomes a row and its keys become columns.
- Does Markdown to HTML support GitHub-flavoured Markdown?
- Yes — tables, fenced code blocks and task lists are supported through the marked parser.