JSON ↔ YAML Converter
Convert JSON to YAML or YAML to JSON for configuration files and API data.
FreeBrowserAbout JSON ↔ YAML Converter
Convert a JSON data document to YAML or turn YAML configuration into JSON. Inspect the resulting structure before copying it into an API request, fixture or configuration file.
When to use this tool
- Translate API data into a readable YAML fixture.
- Convert a YAML configuration into JSON for a script.
Limits to know before using it
Comments, aliases, formatting and YAML-specific values do not necessarily round-trip through JSON. Review data types and large numbers after conversion.
Data handling and cost
The main operation runs in your browser; tool input is not uploaded for processing. The site can still use session cookies and collect operational or usage data as described in the privacy policy.
Free to use in your browser, with no sign-in needed.
Frequently Asked Questions
No. The converter preserves all values, types, and nesting. The only change is the syntax format. Note that YAML supports some types (like dates) that have no direct JSON equivalent — these are converted to strings.
Yes. The converter accepts both formatted and minified JSON as input. The YAML output is always formatted with 2-space indentation.
No. Conversion runs entirely in your browser using JavaScript. Your data is never sent to any server.