Free JSON Converter Online — Convert JSON to XML, YAML, CSV & HTML
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About JSON Converter
This free online JSON converter transforms your JSON data into XML, YAML, CSV, or HTML — all in your browser with no upload required. Whether you need to convert JSON to XML online for legacy system integration, use the online json to csv converter for spreadsheet analysis, or transform JSON to YAML for configuration files, paste your data and get the converted output in one click. AllOneTools never receives your JSON.
Convert JSON to XML Online
Select the XML tab and click Convert to transform your JSON into well-formed XML. Nested JSON objects become nested XML elements, and arrays are represented as repeated sibling elements. Use this online JSON to XML converter free for legacy system integration, SOAP API workflows, and any project that requires hierarchical XML output from a JSON source.
Convert XML to JSON Online
Need to go the other way? Use our online xml to json converter to parse your XML and produce clean, structured JSON in seconds — no software installation required. You can also convert xml to json online directly by pasting XML markup into the XML tab.
Convert JSON to CSV Online
The CSV conversion mode flattens your JSON into rows and columns, making it easy to open in Excel, Google Sheets, or import into a database. This online json to csv converter handles nested objects by dot-notation flattening — so person.name becomes a column header. Ideal for data analysis, reporting, and bulk data migrations.
Convert JSON to YAML Online
Use this online yaml to json converter in reverse: select YAML to produce a clean, human-readable YAML document from your JSON, or paste YAML to get structured JSON output. YAML is the standard format for Kubernetes configs, Docker Compose files, CI/CD pipelines (GitHub Actions, GitLab CI), and many developer tools. Convert JSON to YAML online in one step with no dependencies.
Nested JSON conversion
When you convert nested JSON to CSV online, the converter flattens objects into column names—often dot- or bracket-style paths—so each row stays rectangular. For example, {"user": {"name": "Ada", "id": 1}} becomes headers like user.name and user.id with values in one row; deeper arrays may expand into multiple rows depending on the flattening rules you see in the preview.
Review the grid before download: if a path explodes into dozens of columns, consider trimming the payload or normalizing arrays in JSON first so the sheet matches what analysts expect.
Why Use JSON Converter?
- Quickly convert JSON to XML, YAML, CSV, or HTML formats.
- Preserve data structure and relationships during conversion.
- Save time on manual reformatting of data between different systems.
- Generate structured outputs for different application requirements.
- Process API responses into the format you need for your project.
How To Use
- Paste or upload your JSON code in the editor.
- Select the desired output format (XML, YAML, CSV, HTML).
- Click the "Convert" button to transform your data.
- Copy the result or download it as a file.
- Adjust conversion options if needed for specific format requirements.
Features
- Convert JSON to XML with proper nesting and attribute preservation
- Transform JSON to human-readable YAML format
- Convert JSON to CSV for tabular data representation
- Generate HTML tables from JSON data for web display
- Customize conversion options for each format
- Support for nested objects and arrays
- File upload and download functionality
Pro Tips
- Ensure your JSON is valid before conversion for best results.
- Use XML conversion for hierarchical data that needs to be processed by XML parsers.
- Choose YAML for configuration files and human-readable formats.
- Select CSV for tabular data that needs to be imported into spreadsheets.
- For nested objects, understand that some formats (like CSV) will flatten the structure.
Direct Conversion Tools
Use these dedicated pages for single-direction conversions with a focused interface:
Frequently Asked Questions (FAQ)
How do I convert JSON to XML online for free?
Select the XML tab in the converter, paste your JSON into the input panel, and click Convert. The XML output appears instantly. You can copy or download it — no account or upload needed.
How do I convert a large JSON file to CSV online?
Click Upload to load your JSON file, select the CSV tab, and click Convert. For large nested JSON, the converter flattens nested objects using dot-notation column headers. Use Download to save the CSV file directly.
Can I convert XML to JSON without installing software?
Yes. Use a browser-based XML-to-JSON workflow such as our XML Converter, which can emit JSON from XML sources. This JSON Converter page then takes that JSON and can export CSV, YAML, HTML, or XML again if you need another shape.
What formats can I convert JSON to?
From a JSON input you can produce XML, YAML, CSV, and HTML in this tool. Input must be valid JSON; each format option rewrites the same parsed data for its destination.
Does converting JSON to YAML lose any data?
For ordinary JSON values (objects, arrays, strings, numbers, booleans, null), the conversion is structurally faithful—YAML is just another text encoding. Very large numbers or non-JSON extensions your source never had are not introduced; key order may follow YAML emitter rules but data content is preserved.