YAML to JSON Converter
Turn a YAML config into clean JSON, entirely in your browser, with no upload.
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Convert YAML to JSON
Why convert YAML to JSON
YAML is the format people prefer to write by hand: indentation instead of braces, comments, and no trailing-comma headaches make it the default for CI pipelines, Kubernetes manifests, and app config. JSON is the format machines prefer to read, native to every language, API, and database. Moving between the two is a constant chore in modern development.
Paste any YAML document and this tool returns the equivalent JSON, pretty-printed and ready to drop into a request body, a test fixture, or a settings file.
Types, lists, and nested maps
YAML carries real types, so a value like 42 becomes a JSON number, true becomes a boolean, and an empty value or null becomes JSON null. Sequences turn into arrays and nested mappings into nested objects, so the structure you wrote is preserved exactly.
Quoted strings stay strings, which means a ZIP code written as "02134" or a version like "1.10" keeps its exact text instead of being mangled into a number.
Safe parsing, no surprises
The converter uses a safe YAML loader that does not execute custom tags or arbitrary types, so an untrusted file can never run code in your browser. It is purely a structural translation from YAML to JSON.
If the document has an indentation error or a duplicate key, you get the parser's message pointing at the problem instead of a silently broken result.
Processed locally, never uploaded
Conversion runs in your browser with JavaScript. Your YAML — which often holds secrets, hostnames, and infrastructure details — is never sent to a server and stays on your machine.
With no upload or download round trip the conversion is instant, and it keeps working offline once the page has loaded.
Frequently asked questions
Does my YAML get uploaded anywhere?
No. The document is parsed entirely in your browser and never leaves your device, so it is safe for config files that contain secrets or infrastructure details.
Are types like numbers and booleans preserved?
Yes. YAML scalars become their real JSON types — numbers, booleans, and null — while quoted strings stay strings so identifiers and versions are not corrupted.
Can it handle nested lists and maps?
Yes. Sequences become JSON arrays and nested mappings become nested objects, so the full structure of the document is preserved.
What happens if the YAML is invalid?
You get the parser's error message describing the problem — such as a bad indentation level or a duplicate key — instead of a silently incorrect conversion.
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<a href="https://www.picovert.com/fr/yaml-to-json" target="_blank" rel="noopener">YAML to JSON Converter — Picovert</a>