Category guide
YAML Tools
YAML is often edited by hand for deployment and application settings. A small indentation change can alter the structure, so use the viewer or validator before converting a configuration to another format. The tools here handle JSON-compatible YAML data in your browser.
Choose the right tool
YAML Viewer
Use the tree to confirm which values belong to a mapping or sequence before changing a configuration.
YAML Formatter
Use the formatter after parsing succeeds to produce consistent indentation for a review or commit.
YAML Validator
Use the validator when indentation, quoting, or a malformed sequence prevents a document from loading.
YAML to JSON
Use the converter to inspect the parsed data types that an application would receive as JSON.
All tools
YAML to JSON
Parse YAML and produce formatted JSON.
Open tool →YAML Viewer
Explore YAML data in a searchable, collapsible tree.
Open tool →YAML Formatter
Rewrite YAML data with consistent indentation.
Open tool →YAML Validator
Check YAML syntax and locate parsing errors.
Open tool →YAML to CSV
Convert a YAML list of records into CSV.
Open tool →YAML to XML
Generate XML elements from YAML data.
Open tool →Example workflow: review a deployment setting
- Paste a representative configuration into YAML Validator and resolve any reported syntax position.
- Open it in YAML Viewer to confirm that environment variables, service settings, and lists sit under the intended keys.
- Convert to JSON when you need to compare the parsed structure with an application's expected object shape.
Before you use the result
These tools use a JSON-compatible YAML schema. Comments and original formatting are not retained by data conversion, and circular aliases are rejected. A valid YAML document can still contain the wrong setting name or type for your application.
Why indentation deserves a second look
In YAML, indentation groups data. A list item placed one level too high may still parse, yet change what your program reads. The YAML Viewer exposes the resulting hierarchy, while YAML Validator catches syntax errors. Use both for a configuration changed during an incident: syntax validity alone does not tell you that the intended service receives the setting.
The YAML Formatter rewrites a parsed document with consistent spacing. It is useful for a clean diff, but parsing and writing a data model does not preserve comments or every original presentation choice. Keep the source file if comments carry operational context.
Moving the data elsewhere
Use YAML to JSON to see the data in a form familiar to application code. If you need a table, YAML to CSV expects row-like records; nested structures need flattening, and CSV cells do not retain types. YAML to XML can help with an XML consumer, but inspect the generated element names and repeated items before relying on it. Test a small sample with the receiving application before converting a large file.