How it works
How to use the YAML Parser
Paste YAML
Or open a file.
Inspect the result
Check how values were typed — numbers, booleans, strings and nulls.
Copy the JSON
Export the parsed data.
Why parse to check YAML?
YAML silently converts values such as yes, 010 or 1e3. Seeing the parsed JSON shows exactly what your application will receive.
Built for developers
Why developers use it
Private by design
Runs 100% in your browser. Nothing you paste is uploaded, logged or stored on a server.
Instant results
Output updates as you type, with precise error locations when something is wrong.
Works offline
Once loaded, the tool keeps working without a connection. Install it as an app if you like.
Free, no sign-up
No accounts, no limits, no watermarks.
FAQ
Frequently asked questions
Which YAML version is used?
YAML 1.2, the current specification.
Is my data uploaded anywhere?
No. Everything runs locally in your browser — nothing you paste or open is sent to a server, logged or stored. The tool keeps working offline once the page has loaded.
Keep going
Related tools
- YAML FormatterFormat and validate YAML while keeping comments
- YAML ValidatorValidate YAML with exact error locations
- YAML ViewerExplore YAML as a collapsible tree
- YAML to TSV ConverterConvert YAML lists to tab-separated values
- YAML to HTML Table ConverterConvert YAML lists to an HTML table
- JSON ParserParse JSON and inspect the structure
- JSON to YAMLConvert JSON to YAML and YAML to JSON