Data Format Converter
Paste data in any format — JSON, CSV, YAML, Markdown table, or XML — and convert it to any other format instantly.
About This Free Online Data Format Converter
Our free data format converter lets you paste data in any common format and convert it to any other in one click. Supported formats: JSON (arrays and objects), CSV (comma-separated values with a header row), YAML (using js-yaml), Markdown tables (pipe-separated), and XML. Paste your data and the tool automatically detects the input format, then click a target format button to convert. Downloads are available in the correct file extension. Conversions that require tabular data (CSV and Markdown table output) work best when the input is an array of flat objects — the tool shows a clear error if the structure is incompatible. Everything runs locally in your browser using JavaScript and the js-yaml library; no data is uploaded.
Features of Our Data Format Converter
- Auto-detects input format: JSON, CSV, YAML, Markdown table, or XML
- Converts between all 5 formats in any direction
- Clear error messages when the data structure is incompatible (e.g. nested JSON → CSV)
- Download output as a correctly-named file (.json, .csv, .yaml, .md, .xml)
- Live conversion on paste — updates as you type
- 100% private — all conversion runs locally in your browser
How to Use the Data Format Converter
Using this tool is simple and requires no signup or registration. Follow these steps:
- Paste your data (JSON, CSV, YAML, Markdown table, or XML) into the Input box.
- The tool auto-detects the format and shows it as a badge.
- Click the target format button (e.g. "CSV" to convert JSON to CSV).
- Copy the output or click Download to save the file.
Frequently Asked Questions About Data Format Converter
Which format combinations are supported?
All 5 formats can be converted to and from each other, with the caveat that CSV and Markdown table output require the data to be an array of flat objects. Converting deeply nested JSON or YAML to CSV will show a clear error.
How does format auto-detection work?
Detection uses first-character and first-line heuristics: text starting with [ or { is tried as JSON, < is XML, lines starting with | are Markdown tables, --- is YAML, and comma-containing text without those markers is treated as CSV. If detection is ambiguous, it defaults to the most likely format.
What does "MD Table" mean?
It stands for Markdown Table — the pipe-delimited table format used in Markdown and GitHub README files: columns separated by | characters with a separator row (dashes) below the header.
Can it handle nested JSON?
JSON and YAML can represent nested structures freely. XML output also supports nested objects. CSV and Markdown table output require a flat array of objects — nested values will trigger an error because tabular formats cannot represent hierarchy.
Is my data uploaded anywhere?
No. All parsing and conversion runs locally in your browser using native JavaScript and the js-yaml library. No data is sent to a server.
Is this tool free to use?
Yes, completely free with no signup, no limits, and no usage tracking.
Why Choose Text Toolbox?
Text Toolbox provides free, private, and instant online text tools. Unlike other text utility websites that require signup accounts or send your data to servers, all our tools process your text entirely in your browser. This means your content never leaves your device — we cannot see it, store it, or share it. Our tools are fast, lightweight, and work on any device with a modern web browser.