YAML to JSON Converter
Paste YAML and get clean JSON output instantly.
About the YAML to JSON Converter
This tool converts YAML to JSON, parsing anchors, nested blocks and multi-line strings into structured JSON. When the YAML is invalid it reports the line, which doubles as a quick way to validate a manifest.
Convert YAML to JSON when a config file has to be read by something that only speaks JSON, or when you want to check what a manifest actually says. Indentation-sensitive formats hide mistakes well, and seeing the parsed JSON is the fastest way to confirm a key sits at the level you intended.
The parser handles real-world YAML, not just the simple cases: anchors and aliases, multi-line block scalars, quoted and unquoted strings, and nested sequences of mappings. Type inference follows the YAML spec, so unquoted true becomes a boolean and unquoted 42 becomes a number.
Because parse errors are reported with a line number, this also works as a YAML validator — paste a Kubernetes manifest or CI pipeline and you find out immediately whether it parses at all.
How to use the YAML to JSON Converter
- Paste your YAML. Provide the YAML document, manifest or config file contents.
- Convert. Run the parse to produce JSON.
- Fix any reported errors. If the YAML is invalid, the line number shown points at the problem.
- Copy or download. Copy the JSON output or save it as a .json file.
YAML to JSON Converter features
- Syntax validation
- Anchor resolution
- Nested structure support
- Data type preservation
- Error highlighting
- Real-time conversion
Frequently asked questions
Does it support YAML anchors and aliases?
Yes. Anchors and aliases are resolved, so referenced blocks appear expanded in the JSON output.
Can I use this to validate YAML?
Yes. Invalid YAML fails to parse and the error is reported with a line number, which pinpoints the problem.
How are unquoted values typed?
Following the YAML spec: unquoted true becomes a boolean, 42 becomes a number, and quoted values stay strings.
Are multi-line strings handled?
Yes. Block scalars using the pipe and greater-than styles are parsed with their line breaks preserved correctly.
Does it handle multiple documents in one file?
The first document is converted. Split documents separated by --- and convert them individually.