JSON to YAML Converter Online
Convert JSON to YAML, or YAML to JSON — instantly, entirely in your browser.
JSON input
YAML result
Never uploaded
Conversion happens entirely in your browser — your data never touches our servers.
Both directions
Convert JSON to YAML or YAML to JSON on the same page — just switch modes.
Free, no limit
No account, and no limit on how much data you can convert.
What is YAML?
YAML ("YAML Ain't Markup Language") is a human-readable data format used for configuration files and data exchange — Docker Compose, Kubernetes manifests, GitHub Actions workflows, and countless app config files use YAML instead of JSON because it reads more like plain text, using indentation instead of curly braces and quotes to show structure.
How to Convert Between JSON and YAML
- Choose a direction. "JSON → YAML" converts JSON into YAML; "YAML → JSON" converts the other way.
- Paste your data. Type or paste JSON or YAML into the box, matching the mode you selected.
- Read the result. The conversion happens instantly as you type — no button to click.
- Copy or download. Use the Copy button to copy the result, or Download to save it as a file.
JSON and YAML Are Interchangeable
YAML is a superset of JSON's data model — every JSON document is already valid YAML, and any YAML document that only uses YAML's basic mappings, sequences, and scalars can be converted to JSON without losing information. Both formats represent the same underlying structures (objects, arrays, strings, numbers, booleans, and null) — the only real difference is syntax.
Frequently Asked Questions
How do I convert JSON to YAML?
Paste your JSON with "Convert to YAML" selected — the equivalent YAML appears instantly below. Switch to "Convert to JSON" to go the other direction.
What is YAML used for?
YAML is a human-readable data format commonly used for configuration files — Docker Compose, Kubernetes manifests, GitHub Actions workflows, and many app config files are written in YAML rather than JSON.
What happens if my JSON or YAML is invalid?
You'll see a clear error message describing what's wrong, rather than a blank or broken result.
Does it preserve nested objects and arrays?
Yes — nested objects, arrays, strings, numbers, booleans, and null values all convert correctly in both directions.
Can I convert YAML with comments to JSON?
Yes, YAML comments (lines starting with #) are simply dropped during conversion to JSON, since JSON itself has no comment syntax.
Is my data uploaded anywhere?
No. The conversion runs entirely in your browser — your data is never sent to CurePDF's servers.
Is the JSON to YAML converter free?
Yes, with no account required and no limit on how much data you can convert.
Can I copy or download the result?
Yes — use the Copy button to copy the result to your clipboard, or Download to save it as a file.