Text/Utilities
JSON ↔ YAML Converter
Convert JSON to YAML and YAML to JSON instantly. Validate, pretty-print, and copy the result. Runs in your browser.
About the JSON ↔ YAML Converter
Convert JSON to YAML and YAML to JSON instantly, with validation and pretty-printed output — entirely in your browser.
What this tool does
Paste JSON or YAML, choose the direction, and get clean, correctly-indented output. Invalid input is flagged with the exact parser error so you can fix it quickly. You can also swap the output back into the input to chain conversions.
Why convert between them?
JSON and YAML represent the same data in different styles:
- YAML is easier for humans to read and edit — common in config files, CI pipelines, and Kubernetes.
- JSON is compact and universally supported by APIs and programming languages.
- Converting lets you author in YAML but ship JSON, or read an API's JSON as friendly YAML.
Tips
Keep these in mind when converting:
- YAML is indentation-sensitive — use spaces, not tabs.
- JSON requires double quotes around keys and string values.
- Comments exist in YAML but not JSON, so they are dropped when converting to JSON.
FAQ
Is my data uploaded anywhere?
No. Conversion happens locally in your browser using the js-yaml library.
Why did my YAML fail to convert?
Usually an indentation or syntax issue. The exact error message from the parser is shown so you can locate it.
Does it preserve key order?
Yes, key order from your input is preserved in the output.
Are YAML comments kept?
Comments are preserved only within YAML. Because JSON has no comment syntax, they are removed when converting YAML to JSON.
Related tools
Pro tip: pair this tool with Upside Down Text Generator and Text Similarity Checker for a faster SEO workflow.