JSON to YAML Converter
Convert JSON to YAML online, free and instantly. Runs entirely in your browser — nothing is uploaded, and there is no file size limit.
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Output
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About this tool
Convert JSON into YAML in a single step. JSON is the default interchange format for web APIs; YAML is the configuration format used by Kubernetes, CI pipelines and Docker Compose. The converter is structure-aware rather than a text substitution, so nesting, types and ordering are preserved.
When you would use it
- Turning JSON output into a config file a pipeline can read
- Migrating a dataset from JSON to YAML
- Inspecting JSON in a shape that is easier to read
Worked example
{
"id": 4815,
"name": "Ada Lovelace",
"active": true,
"score": 91.5,
"roles": ["admin", "editor"],
"address": { "city": "London", "postcode": "NW1" }
}
id: 4815 name: Ada Lovelace active: true score: 91.5 roles: - admin - editor address: city: London postcode: NW1
Things worth knowing
- Strings that would otherwise resolve to another type —
yes,null,1.10— are quoted automatically. - Multi-line strings are emitted as block literals (
|) rather than escaped one-liners, which is far more readable.
Questions
Frequently asked
Is JSON to YAML conversion lossless?
Yes for structure and values. Converting back gives you an equivalent document.
Why convert JSON to YAML?
JSON is the default interchange format for web APIs, while YAML is the configuration format used by Kubernetes, CI pipelines and Docker Compose. Converting is usually about handing data to a tool that only speaks one of them — a Kubernetes manifest or CI pipeline, for instance.
Is my data uploaded anywhere?
No. Every tool on JSONWorks runs entirely in your browser using JavaScript. Your input is never sent to a server, never logged and never stored. The simplest proof is to disconnect from the internet — the tools keep working. The site does load Google Fonts and a Google Analytics page-view tag, so you will see those two requests in your network tab, but neither receives anything you type or paste.
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