Convert YAML to JSON Online
Quickly and accurately convert your YAML configuration files into JSON format. This free tool preserves your data structure and offers formatting options for clean, usable JSON output.
YAML to JSON Converter
Convert YAML data to JSON format instantly
How it works
Paste your YAML configuration into the input area. The converter parses the YAML structure and transforms it into equivalent JSON format. Nested objects and arrays convert naturally to JSON's brace-based syntax.
Options control output style: prettify for readable multi-line JSON with indentation, or minify for compact single-line output. Choose based on your use case - readability or file size.
Conversion example:
YAML Input:
name: John
age: 30
hobbies:
- reading
- gaming
JSON Output:
{
"name": "John",
"age": 30,
"hobbies": ["reading", "gaming"]
}The converter preserves data types: numbers stay numbers, booleans remain true/false, null converts to JSON null. Complex nested structures maintain their hierarchy through JSON's object and array syntax.
When You'd Actually Use This
API development
REST APIs typically use JSON. Convert YAML specs. Transform config to API format. Client compatibility.
JavaScript applications
Node.js prefers JSON configs. Package.json format. Convert YAML settings. Native JavaScript compatibility.
Data interchange
JSON is universal data format. Convert for external systems. Webhook payloads. Third-party integrations.
Database imports
MongoDB uses JSON-like format. Import YAML data. Transform for NoSQL. Data migration tasks.
Configuration comparison
JSON diff tools more common. Convert for comparison. Version control diffs. Change tracking.
Testing and mocking
Test fixtures often JSON. Convert YAML test data. Mock API responses. Test data preparation.
What to Know Before Using
JSON requires quoted keys.All keys become quoted strings. YAML's unquoted keys convert properly. Valid JSON output guaranteed.
Some YAML features don't map.Anchors and aliases expand. Multi-document becomes array. Comments are lost. Data preserved, metadata not.
Prettify adds readability.Indented output easier to read. 2-space standard indentation. Choose minify for size.
JSON is stricter than YAML.No trailing commas allowed. Requires double quotes. Converter handles this automatically.
Pro tip: JSON doesn't support comments. If you need comments in output, keep YAML or use JSON5. Consider your requirements.
Common Questions
Is the conversion reversible?
Yes, JSON to YAML converter available. Data preserved both ways. Round-trip conversion works. Structure maintained.
Does it handle large files?
Browser-based conversion. Most files work fine. Very large files may be slow. Split if needed.
What about YAML comments?
JSON doesn't support comments. They're lost in conversion. Add comments back if needed. Or keep YAML format.
Can I download the JSON?
Yes, download button saves as .json file. Or copy to clipboard. Direct use in projects. Ready for commit.
Does it validate YAML first?
Yes, invalid YAML shows error. Fix before conversion. Ensures valid JSON output. Clear error messages.
What encoding is used?
UTF-8 encoding standard. Supports Unicode characters. International text preserved. Emoji and special chars work.
Is this secure for sensitive data?
Conversion happens in browser. Data doesn't leave your computer. Safe for configs. Still remove secrets before sharing.
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