JSON to YAML converter
Convert JSON to YAML and YAML back to JSON, in either direction.
Input
Result
The result will appear here.Your runs
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Most configuration now arrives as YAML and most APIs still speak JSON, so the conversion between them is a daily chore. This runs it in both directions using the same YAML implementation that Node tooling uses, which means anchors, multi-line scalars and explicit types survive the trip instead of being flattened into strings.
How it works
- Conversion runs in your browser on the eemeli/yaml parser, the reference implementation for YAML 1.2 in JavaScript.
- Going to JSON, YAML comments are dropped, because JSON has nowhere to put them.
- Indentation applies to whichever side you are producing.
Where your data goes
Nowhere. This tool runs entirely in your browser: the text you paste is processed by the page and is never transmitted to a server or written to a log.
When a run costs points, a one-line summary is saved to your own history so you can find it again. The summary records the shape of the run — sizes, counts, the values you looked up — never the content you pasted.
What it costs
Free up to 50.0 KB per run without an account. Past that, a run costs 1 points and is saved to your history.
Points come from signing up, checking in daily, commenting and completing your profile.
See how points workCommon questions
- Will my YAML comments survive the round trip?
- No, and no converter can make them. JSON has no comment syntax, so a comment has nowhere to live once the document becomes JSON, and nothing to be restored from on the way back.
- Why did my version number become a string?
- YAML reads an unquoted 1.10 as the number 1.1, which silently loses the trailing zero, and treats an unquoted 1.2.3 as a string because it is not a number at all. The inconsistency is the trap. Quote version numbers in YAML and they convert exactly, every time.
- Does this handle multi-document YAML?
- It converts the first document. A file separated by --- into several documents has no single JSON equivalent, so splitting it is a decision the tool leaves to you.
The open-source behind it
This tool runs on eemeli/yaml, released under ISC. If you need the same behaviour inside your own program, that is the library to reach for.
eemeli/yamlAlso known as
- json to yaml
- yaml to json
- yaml converter
- convert json yaml online
- yaml formatter