Convert JSON to YAML

Paste JSON data or open a file and get YAML instantly. Free, no sign-up — and your data never leaves your device.

Input Open file

Output

Settings

Input separatorFirst row contains column namesDetect numbers and true/falseOtherwise every value stays textOutput separatorUse semicolon for Excel in many European countriesExcel-friendly encoding (UTF-8 BOM)Keeps letters like ą, é, ü correct when the CSV is opened in ExcelIndentationXML element namesUsed when the data has no names of its own

How to convert JSON to YAML

Paste your JSON into the Input box, click Open file, or drag a file onto it.
Check the output format (YAML) and adjust Settings if needed — separator, column names, indentation.
Click Copy or Download.

About JSON and YAML

JSON is the standard data format of web APIs and JavaScript apps. It can hold nested objects and lists.

YAML is a human-friendly format for configuration files (Docker Compose, Kubernetes, GitHub Actions).

Frequently asked questions

How do I convert JSON to YAML?

Paste your JSON data into the Input box or open a file. The YAML result appears instantly on the right — copy it or click Download.

Is my data uploaded anywhere?

No. FileCrafty converts the data inside your browser, so customer lists, exports and API keys never leave your device. It also works offline once the page is open.

Does it accept JSON Lines (one object per line)?

Yes. Files with one JSON object per line (.jsonl / NDJSON) are read as a list of records.

Is there a size limit?

There is no fixed limit — files of tens of megabytes work fine on a computer. Very large files are not shown in the text box, but they are still converted in full.

Is it free?

Yes — free, unlimited and without sign-up.

More data tools

More free tools

CSV to JSONTurn CSV into JSON objects or JSON into CSV. Separator is detected automatically.Excel to CSVConvert .xlsx sheets to CSV and CSV to Excel — with Excel-friendly encoding.JSON to ExcelOpen API data in Excel: nested JSON becomes tidy columns. Or export a sheet as JSON.XML to JSONConvert XML feeds and exports to JSON or CSV, and JSON back to XML.YAML to JSONConvert YAML config files (Docker, Kubernetes, CI) to JSON and back.JSON formatterBeautify, minify and validate JSON — errors shown with line and column.