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JSON Transformer

Convert between JSON, XML, YAML, TOML, CSV, TSV, XLSX/XLS/ODS, Markdown Table, HTML Table, INI, and Properties formats. Everything runs in your browser — nothing is uploaded.

This json transformer is a general-purpose data format converter for developers, analysts, and anyone who needs to move data between systems that expect different formats. It reads JSON, XML, YAML, TOML, CSV/TSV, spreadsheet files (XLSX, XLS, ODS via SheetJS), Markdown tables, HTML tables, INI, and Java-style Properties files, then writes the result out in any of those same formats. Nested objects are automatically flattened into dotted keys for tabular formats like CSV, and flattened rows are reconstructed back into nested JSON on the way in. Use it to turn an API response into a spreadsheet, convert a YAML config to JSON, or pull a table out of an HTML page. Parsing and conversion happen entirely in your browser using open-source libraries, so files never get uploaded anywhere.

Input
Output
Output will appear here after conversion

How to Use JSON Transformer

  1. Paste your input data into the left panel.
  2. Select your input format from the "From" dropdown.
  3. Select your desired output format from the "To" dropdown.
  4. Click "Convert" to transform your data.
  5. Copy the result or click Download to save the output file.

Frequently Asked Questions

Paste JSON in the input, select YAML as output, click Convert. The tool produces valid YAML instantly — no sign-up required.

JSON, XML, YAML, TOML, CSV, TSV, XLSX, XLS, ODS, Markdown Table, HTML Table, INI, and Properties — 13 formats total.

Select JSON as input and XLSX as output, paste your JSON array, click Convert. The tool generates a downloadable Excel spreadsheet.

Yes. Select YAML as input and JSON as output — all format pairs are bidirectional.

Completely free, unlimited conversions, no API key, and everything runs in your browser.